138757252 has 24 divisors (see below), whose sum is σ = 260237376. Its totient is φ = 64567008.

The previous prime is 138757231. The next prime is 138757261. The reversal of 138757252 is 252757831.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16978 + ... + 23785.

It is an arithmetic number, because the mean of its divisors is an integer number (10843224).

Almost surely, 2^138757252 is an apocalyptic number.

It is an amenable number.

138757252 is a deficient number, since it is larger than the sum of its proper divisors (121480124).

138757252 is a wasteful number, since it uses less digits than its factorization.

138757252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40827 (or 40825 counting only the distinct ones).

The product of its digits is 117600, while the sum is 40.

The square root of 138757252 is about 11779.5268156238. The cubic root of 138757252 is about 517.7084220411.

The spelling of 138757252 in words is "one hundred thirty-eight million, seven hundred fifty-seven thousand, two hundred fifty-two".