138897025 has 12 divisors (see below), whose sum is σ = 173104000. Its totient is φ = 110555280.

The previous prime is 138897013. The next prime is 138897091. The reversal of 138897025 is 520798831.

It is not a de Polignac number, because 138897025 - 2⁵ = 138896993 is a prime.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 8985 + ... + 18934.

Almost surely, 2^138897025 is an apocalyptic number.

It is an amenable number.

138897025 is a deficient number, since it is larger than the sum of its proper divisors (34206975).

138897025 is a wasteful number, since it uses less digits than its factorization.

138897025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28128 (or 28123 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 138897025 is about 11785.4582006810. The cubic root of 138897025 is about 517.8821964438.

The spelling of 138897025 in words is "one hundred thirty-eight million, eight hundred ninety-seven thousand, twenty-five".