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, and in base 10 it is divisible by the sum of its digits, which makes it a Harshad 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:
