140 (number)

140 is the natural number following 139 and preceding 141.

In mathematics

140 is an abundant number and a harmonic divisor number. It is the sum of the squares of the first seven integers, which makes it a square pyramidal number.
140 is an odious number because it has an odd number of ones in its binary representation. The sum of Euler's totient function φ over the first twenty-one integers is 140.
140 is a repdigit in bases 13, 19, 27, 34, 69, and 139.

In other fields

140 is also:

The former Twitter entry-character limit, a well-known characteristic of the service
* A film, based on the Twitter entry-character limit, created and edited by Frank Kelly of Ireland