72465621 has 16 divisors (see below), whose sum is σ = 100499520. Its totient is φ = 46408320.

The previous prime is 72465619. The next prime is 72465623. The reversal of 72465621 is 12656427.

It is an interprime number because it is at equal distance from previous prime (72465619) and next prime (72465623).

It is not a de Polignac number, because 72465621 - 2¹ = 72465619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72465623) 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, 3265 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (6281220).

Almost surely, 2^72465621 is an apocalyptic number.

It is an amenable number.

72465621 is a deficient number, since it is larger than the sum of its proper divisors (28033899).

72465621 is a wasteful number, since it uses less digits than its factorization.

72465621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9316.

The product of its digits is 20160, while the sum is 33.

The square root of 72465621 is about 8512.6741391880. The cubic root of 72465621 is about 416.9116260573.

The spelling of 72465621 in words is "seventy-two million, four hundred sixty-five thousand, six hundred twenty-one".