139257512 has 16 divisors (see below), whose sum is σ = 262194900. Its totient is φ = 69338880.

The previous prime is 139257511. The next prime is 139257533. The reversal of 139257512 is 215752931.

It can be written as a sum of positive squares in 2 ways, for example, as 138627076 + 630436 = 11774^2 + 794^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (139257511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34187 + ... + 38042.

Almost surely, 2^139257512 is an apocalyptic number.

It is an amenable number.

139257512 is a deficient number, since it is larger than the sum of its proper divisors (122937388).

139257512 is a wasteful number, since it uses less digits than its factorization.

139257512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72476 (or 72472 counting only the distinct ones).

The product of its digits is 18900, while the sum is 35.

The square root of 139257512 is about 11800.7420105687. The cubic root of 139257512 is about 518.3298386763.

The spelling of 139257512 in words is "one hundred thirty-nine million, two hundred fifty-seven thousand, five hundred twelve".