Numerology is any of many systems, traditions or beliefs in a mystical or esoteric relationship between numbers and physical objects or living things.

Numerology and numerological divination were popular among early mathematicians, such as Pythagoras, but are no longer considered part of mathematics and are regarded as pseudomathematics by modern scientists.FEMINIST NUMEROLOGY by Prof John Webb, Science in Africa This is similar to the historical relationships between astrology and astronomy, and between alchemy and chemistry.