138125625 has 80 divisors (see below), whose sum is σ = 259267008. Its totient is φ = 64800000.

The previous prime is 138125623. The next prime is 138125639. The reversal of 138125625 is 526521831.

It is not a de Polignac number, because 138125625 - 2¹ = 138125623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (138125623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 763035 + ... + 763215.

Almost surely, 2^138125625 is an apocalyptic number.

138125625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138125625 is a deficient number, since it is larger than the sum of its proper divisors (121141383).

138125625 is a wasteful number, since it uses less digits than its factorization.

138125625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 237 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 138125625 is about 11752.6858632399. The cubic root of 138125625 is about 516.9216858756.

The spelling of 138125625 in words is "one hundred thirty-eight million, one hundred twenty-five thousand, six hundred twenty-five".