139531264 has 22 divisors (see below), whose sum is σ = 278928314. Its totient is φ = 69765120.

The previous prime is 139531261. The next prime is 139531277. The reversal of 139531264 is 462135931.

It can be written as a sum of positive squares in only one way, i.e., 139428864 + 102400 = 11808^2 + 320^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139531261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67107 + ... + 69154.

Almost surely, 2^139531264 is an apocalyptic number.

It is an amenable number.

139531264 is a deficient number, since it is larger than the sum of its proper divisors (139397050).

139531264 is an equidigital number, since it uses as much as digits as its factorization.

139531264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136281 (or 136263 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 139531264 is about 11812.3352475283. The cubic root of 139531264 is about 518.6692601103.

The spelling of 139531264 in words is "one hundred thirty-nine million, five hundred thirty-one thousand, two hundred sixty-four".