72825621 has 16 divisors (see below), whose sum is σ = 106379328. Its totient is φ = 43948800.

The previous prime is 72825601. The next prime is 72825631. The reversal of 72825621 is 12652827.

It is not a de Polignac number, because 72825621 - 2⁵ = 72825589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72825601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3375 + ... + 12531.

It is an arithmetic number, because the mean of its divisors is an integer number (6648708).

Almost surely, 2^72825621 is an apocalyptic number.

It is an amenable number.

72825621 is a deficient number, since it is larger than the sum of its proper divisors (33553707).

72825621 is a wasteful number, since it uses less digits than its factorization.

72825621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9412.

The product of its digits is 13440, while the sum is 33.

The square root of 72825621 is about 8533.7928847611. The cubic root of 72825621 is about 417.6008739486.

The spelling of 72825621 in words is "seventy-two million, eight hundred twenty-five thousand, six hundred twenty-one".