72657275 has 6 divisors (see below), whose sum is σ = 90095052. Its totient is φ = 58125800.

The previous prime is 72657271. The next prime is 72657281. The reversal of 72657275 is 57275627.

It is not a de Polignac number, because 72657275 - 2² = 72657271 is a prime.

It is a super-2 number, since 2×72657275² = 10558159220851250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72657271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1453121 + ... + 1453170.

It is an arithmetic number, because the mean of its divisors is an integer number (15015842).

Almost surely, 2^72657275 is an apocalyptic number.

72657275 is a deficient number, since it is larger than the sum of its proper divisors (17437777).

72657275 is a wasteful number, since it uses less digits than its factorization.

72657275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906301 (or 2906296 counting only the distinct ones).

The product of its digits is 205800, while the sum is 41.

The square root of 72657275 is about 8523.9236857213. The cubic root of 72657275 is about 417.2788459051.

The spelling of 72657275 in words is "seventy-two million, six hundred fifty-seven thousand, two hundred seventy-five".