72506275 has 12 divisors (see below), whose sum is σ = 95197032. Its totient is φ = 54592640.

The previous prime is 72506267. The next prime is 72506333. The reversal of 72506275 is 57260527.

It is a happy number.

It is not a de Polignac number, because 72506275 - 2³ = 72506267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72506275.

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 11 ways as a sum of consecutive naturals, for example, 84877 + ... + 85726.

It is an arithmetic number, because the mean of its divisors is an integer number (7933086).

Almost surely, 2^72506275 is an apocalyptic number.

72506275 is a deficient number, since it is larger than the sum of its proper divisors (22690757).

72506275 is a wasteful number, since it uses less digits than its factorization.

72506275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170630 (or 170625 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 72506275 is about 8515.0616556781. The cubic root of 72506275 is about 416.9895754649.

The spelling of 72506275 in words is "seventy-two million, five hundred six thousand, two hundred seventy-five".