72156725 has 12 divisors (see below), whose sum is σ = 89904960. Its totient is φ = 57447600.

The previous prime is 72156719. The next prime is 72156739. The reversal of 72156725 is 52765127.

It is a happy number.

It is not a de Polignac number, because 72156725 - 2²² = 67962421 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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, 1565 + ... + 12114.

It is an arithmetic number, because the mean of its divisors is an integer number (7492080).

Almost surely, 2^72156725 is an apocalyptic number.

It is an amenable number.

72156725 is a deficient number, since it is larger than the sum of its proper divisors (17748235).

72156725 is a wasteful number, since it uses less digits than its factorization.

72156725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13900 (or 13895 counting only the distinct ones).

The product of its digits is 29400, while the sum is 35.

The square root of 72156725 is about 8494.5114632920. The cubic root of 72156725 is about 416.3183987616.

The spelling of 72156725 in words is "seventy-two million, one hundred fifty-six thousand, seven hundred twenty-five".