# Odd number

From Encyclopedia of Mathematics

An integer that is not divisible by $2$ (without remainder). Odd numbers are: $\pm1, \pm3, \pm5, \pm7, \pm9, \pm11,\dots$

#### Comments

An integer that is not odd is called even (cf. Even number).

**How to Cite This Entry:**

Odd number.

*Encyclopedia of Mathematics.*URL: http://encyclopediaofmath.org/index.php?title=Odd_number&oldid=29222