72157250 has 64 divisors (see below), whose sum is σ = 155226240. Its totient is φ = 24840000.

The previous prime is 72157199. The next prime is 72157271. The reversal of 72157250 is 5275127.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51560 + ... + 52940.

It is an arithmetic number, because the mean of its divisors is an integer number (2425410).

Almost surely, 2^72157250 is an apocalyptic number.

72157250 is an abundant number, since it is smaller than the sum of its proper divisors (83068990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72157250 is a wasteful number, since it uses less digits than its factorization.

72157250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 72157250 is about 8494.5423655427. The cubic root of 72157250 is about 416.3194084463.

The spelling of 72157250 in words is "seventy-two million, one hundred fifty-seven thousand, two hundred fifty".