Base Numbers 1, 3, 5, and 6 in Chaldean Numerology

In Pythagorean numerology, when dealing with base or root numbers from 1 to 9, there’s a strong emphasis on the distinction between odd and even numbers. Odd numbers are generally considered masculine, bright, courageous, and more favorable. Even numbers, on the other hand, are viewed as feminine, darker, more cautious, reserved, and generally less favorable.

While this perspective can to some extent be applied in Chaldean numerology as well, this system primarily classifies root numbers into what are referred to as strong and weak numbers. The strong numbers are 1, 3, 5, and 6. The weak numbers are 4 and 8. Numbers 2, 7, and 9 are considered more neutral.

The term “strong” here doesn’t refer to influence, physical strength, or self-confidence. For instance, nines are often physically robust and confident, and some sevens can be quite combative. In this context, “strong” refers more to a combination of ease and at least a certain degree of balanced energy—qualities that tend to bring positive outcomes.

In contrast, numbers 4 and 8 are generally seen as unbalanced, and thus often considered unfavorable. When operating in a negative way, these numbers can still be very powerful, but unfortunately not in a way that supports balance. For this reason, modern numerologists often refer to them as karmic numbers.

This classification into strong and weak numbers dates to ancient numerology. Some modern Chaldean numerologists put more emphasis on this division, while others give it less weight. Number 5 is sometimes regarded as more neutral, depending on the interpretation.

So-Called “Karmic Numbers” in Chaldean and Pythagorean Numerology

Karma refers to the principle of cause and effect—the idea that certain causes inevitably lead to certain consequences. Because this connection enables a cause to attract a specific outcome, the law of karma can also be seen as a form of the law of attraction. Agricultural metaphors are often used in relation to karma. One of the most well-known sayings is: “You reap what you sow.” The law of karma is also closely related to the so-called “Golden Rule,” which, in Christian tradition, is expressed as:

“So in everything, do to others what you would have them do to you, for this sums up the Law and the Prophets.” (Matthew 7:12)

Opinions differ on whether the law of karma always applies or whether exceptions exist. There’s also debate about whether karma necessarily requires a reversal of roles over time, which presumes the existence of a reincarnation cycle. Most Christians, however, believe that final karmic justice is not achieved through multiple lifetimes but rather through God’s judgment as a singular event.

Nevertheless, both astrology and numerology must, to some degree, adhere to the principle of karma. Otherwise, we couldn’t claim that specific planetary alignments or numbers lead to specific outcomes. In that sense, all numbers can be considered karmic to some extent.

However, there are narrower interpretations of “karmic numbers.” In Pythagorean numerology, the following are traditionally regarded as karmic:

  • 13 – associated with death and destruction (influenced by the Tarot)
  • 14 – linked to accidents, illness, and loss
  • 16 – connected to downfall or collapse (also reflecting Tarot influence)
  • 19 – represents unresolved past challenges that manifest as difficulties in the present

These numbers are said to bring challenges, but in some cases, they can have positive effects—especially when one chooses a more spiritual path.

In contrast, Chaldean numerology generally regards base numbers 4 and 8 as karmic. These numbers often carry challenges or bring about difficult circumstances. They may also generate ongoing karma. However, individuals operating on a higher spiritual level may experience these numbers as karmic rewards rather than burdens.

Beyond the base numbers, all compound numbers in Chaldean numerology are considered karmic as well. If a compound number is positive (such as 10, 15, 17, 19, 21, 23, 24, 25, 27, and others), it is believed to generate or express favorable karma. If it is negative (like 11, 12, 16, 18, 22, 26, 28, 29, and so on), it is thought to produce or exprtess challenging or negative karma. The philosophy behind these numbers often aligns with that of the Tarot.

Chaldean numerology also attributes aspects of one’s past karma to the birth date, viewing it as a reflection of existing karmic patterns. Meanwhile, name numbers and the Life Path number point more to the direction of personal growth and the creation of new karma.

So how do Chaldean and Pythagorean numerology relate in terms of karmic numbers? Interestingly, both systems associate 14 with accidents and misfortune (traditional Chaldean system!), and both see 16 as a number of collapse or downfall. The number 13 has traditionally been considered unlucky in both systems as well. Descriptions of 13 and 16 in both approaches are heavily influenced by Tarot symbolism.

Despite these similarities, the differences between the two systems are significant. In the Pythagorean tradition, base numbers 4 and 8 are not generally seen as problematic. In contrast, modern Chaldean numerology does not necessarily view 13 as a symbol of death or destruction—it can actually be beneficial in many cases. The number 19 is usually regarded as extremely fortunate, though in very specific number combinations it may act in a way similar to the challenging number 28. Perhaps the most fundamental difference is that Chaldean numerologists interpret all compound numbers through a karmic lens.

On Karma and Changing One’s Name

In Chaldean numerology, there are both proponents and opponents of changing one’s name or surname. Advocates of this practice argue that altering one’s name is a legitimate way to introduce more harmonious vibrations into one’s life. One of the first modern Chaldean numerologists to support this idea was Isidore Kozminsky in the early 20th century.[1] In 1926, numerologist Cheiro also advocated for it in his book.[2] Due to Cheiro’s influence, changing one’s name is much more common among Chaldean numerology practitioners than among those who follow modern Pythagorean numerology.

However, there are also opposing views. For example, William Mykian believes that our true name is given at birth and that changing it—even in cases of natural changes, such as marriage—can lead to confusion and difficulties.[3] Bodil Storm argues that name changes should not be made based on numerology because our name and surname carry karmic imprints.[4]

It is important to note that changing a name can indeed present challenges. On one hand, after making a change, there is often an adjustment period as one aligns with the new vibrations. This period can involve intense cleansing and challenges, sometimes lasting several months or even years. On the other hand, Chaldean numerologists often overlook the significance of consonant numbers, which have a substantial impact on the quality of a numerology chart. Ultimately, a name change can result in vibrational shifts that numerologists may not foresee—or may not even be able to predict.

That being said, these concerns should not be taken as arguments against changing one’s name based on Chaldean numerology principles. A birth name is not a fixed, unchangeable element. While we cannot alter the planetary positions in our birth chart, we can change our name or surname. Thus, excessive fatalism in this regard is unnecessary. Many people report positive effects from adopting a new name or surname. The key is to ensure that the new vibrations are truly beneficial, and there are ways to achieve this, at least to some extent.

Regarding the supposed prohibition of numerologically altering one’s name due to karmic imprints, it is crucial to first understand what karma truly is. At its core, karma is the law of cause and effect, but it also operates as a form of the law of attraction. A specific cause draws in a corresponding effect. Karma is not something fixed; rather, it is constantly shaped by our thoughts, emotions, and actions. A common metaphor is that of farming: we reap what we sow.

Consider someone traveling from Madrid to London. If they board a flight to New York instead, they will not arrive in London. Action triggers reaction, and choices lead to consequences. Similarly, one does not typically attend a business meeting in a sweaty, tattered shirt that hasn’t been changed in ten days—otherwise, others may avoid them and not take them seriously. Likewise, if we do not pursue education, we are unlikely to gain deep knowledge in the fields that interest us.

An unfavorable name vibration is like a sweaty shirt—it is advisable to change it before an important business meeting. It is like flying from Madrid to New York while intending to reach London. With enough money, layovers, and delays, one might still eventually reach London, but why not simply take a direct flight from Madrid? The decision to change one’s name or surname is like planting a new seed, which, according to the law of karma, will eventually yield benefits.

There is nothing in this process that contradicts natural laws. In fact, it is a direct application of the law of karma. However, it is important to remember that numerology only influences a part of our destiny. It does not alter planetary karma or the karmic influences of elemental flows in the astrology of Mother Earth (such as the Chinese Four Pillars system, or Bazi). Personal initiative and spiritual connection also create new opportunities—and thus, new karma. Therefore, while the significance of name changes should not be dismissed, it is equally important not to overemphasize their impact.


[1] Kozminsky, Isidore (1912): Numbers. Their Meaning and Magic. Samuel Weiser Inc. Pg. 57.

[2] Cheiro: Cheiro’s Book of numbers. 1935 Edition.

[3] Mykian, William (2011): Numerology Made Easy. Xlibris Corporation, USA. Pg. 142-143.

[4] Storm, Bodyl (2005): Numerology. Pyramideforlaget, Oslo. Amazon Kindle.