Numerology is any research of the supposed heavenly, magical or other unique connection between a variety and some coinciding noticed (or perceived) activities. It has many techniques and customs and values. Numerology and numerological divination by techniques such as isopsephy were well-known among beginning specialised mathematicians, such as Pythagoras, but are not regarded aspect of arithmetic and are regarded as pseudomathematics or pseudoscience by contemporary researchers.

Today, numerology is often associated with the supernatural, together with zodiac and identical divinatory artistry.

The phrase numerologist is also used derogatorily for those recognized to position unwanted trust in mathematical styles (and sketch technically unsound implications from them), even if those individuals do not exercise conventional numerology. For example, in his 1997 guide Numerology: Or What Pythagoras Wrought, math wizzard Underwood Dudley uses the phrase to talk about experts of the Elliott trend concept of inventory exchange research.

Despite the lengthy record of numerological concepts, the phrase "numerology" in not documented in British before