138615124 has 12 divisors (see below), whose sum is σ = 242875584. Its totient is φ = 69222104.

The previous prime is 138615121. The next prime is 138615149. The reversal of 138615124 is 421516831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138615121) 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, 17644 + ... + 24259.

It is an arithmetic number, because the mean of its divisors is an integer number (20239632).

Almost surely, 2^138615124 is an apocalyptic number.

It is an amenable number.

138615124 is a deficient number, since it is larger than the sum of its proper divisors (104260460).

138615124 is a wasteful number, since it uses less digits than its factorization.

138615124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42734 (or 42732 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 138615124 is about 11773.4924300311. The cubic root of 138615124 is about 517.5316000525.

The spelling of 138615124 in words is "one hundred thirty-eight million, six hundred fifteen thousand, one hundred twenty-four".