138592725 has 12 divisors (see below), whose sum is σ = 229140096. Its totient is φ = 73916080.

The previous prime is 138592709. The next prime is 138592747. The reversal of 138592725 is 527295831.

It is a happy number.

It is not a de Polignac number, because 138592725 - 2⁴ = 138592709 is a prime.

It is a congruent number.

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, 923877 + ... + 924026.

It is an arithmetic number, because the mean of its divisors is an integer number (19095008).

Almost surely, 2^138592725 is an apocalyptic number.

138592725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138592725 is a deficient number, since it is larger than the sum of its proper divisors (90547371).

138592725 is a wasteful number, since it uses less digits than its factorization.

138592725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847916 (or 1847911 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 138592725 is about 11772.5411445448. The cubic root of 138592725 is about 517.5037223471.

The spelling of 138592725 in words is "one hundred thirty-eight million, five hundred ninety-two thousand, seven hundred twenty-five".