72257725 has 24 divisors (see below), whose sum is σ = 91869120. Its totient is φ = 56363520.

The previous prime is 72257719. The next prime is 72257761. The reversal of 72257725 is 52775227.

It is not a de Polignac number, because 72257725 - 2⁷ = 72257597 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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201096 + ... + 201454.

It is an arithmetic number, because the mean of its divisors is an integer number (3827880).

Almost surely, 2^72257725 is an apocalyptic number.

It is an amenable number.

72257725 is a deficient number, since it is larger than the sum of its proper divisors (19611395).

72257725 is a wasteful number, since it uses less digits than its factorization.

72257725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 544 counting only the distinct ones).

The product of its digits is 68600, while the sum is 37.

The square root of 72257725 is about 8500.4543996189. The cubic root of 72257725 is about 416.5125527822.

The spelling of 72257725 in words is "seventy-two million, two hundred fifty-seven thousand, seven hundred twenty-five".