138125075 has 24 divisors (see below), whose sum is σ = 188733456. Its totient is φ = 99440000.

The previous prime is 138125069. The next prime is 138125083. The reversal of 138125075 is 570521831.

It is not a de Polignac number, because 138125075 - 2¹⁸ = 137862931 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25289 + ... + 30261.

It is an arithmetic number, because the mean of its divisors is an integer number (7863894).

Almost surely, 2^138125075 is an apocalyptic number.

138125075 is a deficient number, since it is larger than the sum of its proper divisors (50608381).

138125075 is a wasteful number, since it uses less digits than its factorization.

138125075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095 (or 5090 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 138125075 is about 11752.6624643099. The cubic root of 138125075 is about 516.9209997676.

The spelling of 138125075 in words is "one hundred thirty-eight million, one hundred twenty-five thousand, seventy-five".