138875025 has 12 divisors (see below), whose sum is σ = 229606832. Its totient is φ = 74066640.

The previous prime is 138875021. The next prime is 138875053. The reversal of 138875025 is 520578831.

It is not a de Polignac number, because 138875025 - 2² = 138875021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138875021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 925759 + ... + 925908.

Almost surely, 2^138875025 is an apocalyptic number.

138875025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138875025 is a deficient number, since it is larger than the sum of its proper divisors (90731807).

138875025 is a wasteful number, since it uses less digits than its factorization.

138875025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851680 (or 1851675 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 138875025 is about 11784.5248101058. The cubic root of 138875025 is about 517.8548524218.

The spelling of 138875025 in words is "one hundred thirty-eight million, eight hundred seventy-five thousand, twenty-five".