138615125 has 16 divisors (see below), whose sum is σ = 188720064. Its totient is φ = 100810000.

The previous prime is 138615121. The next prime is 138615149. The reversal of 138615125 is 521516831.

It is not a de Polignac number, because 138615125 - 2² = 138615121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138615091 and 138615100.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49031 + ... + 51780.

It is an arithmetic number, because the mean of its divisors is an integer number (11795004).

Almost surely, 2^138615125 is an apocalyptic number.

It is an amenable number.

138615125 is a deficient number, since it is larger than the sum of its proper divisors (50104939).

138615125 is a wasteful number, since it uses less digits than its factorization.

138615125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100837 (or 100827 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The square root of 138615125 is about 11773.4924724994. The cubic root of 138615125 is about 517.5316012971.

The spelling of 138615125 in words is "one hundred thirty-eight million, six hundred fifteen thousand, one hundred twenty-five".