72621065 has 32 divisors (see below), whose sum is σ = 99090432. Its totient is φ = 50616000.

The previous prime is 72621061. The next prime is 72621067. The reversal of 72621065 is 56012627.

It is not a de Polignac number, because 72621065 - 2² = 72621061 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72621061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325544 + ... + 325766.

It is an arithmetic number, because the mean of its divisors is an integer number (3096576).

Almost surely, 2^72621065 is an apocalyptic number.

It is an amenable number.

72621065 is a deficient number, since it is larger than the sum of its proper divisors (26469367).

72621065 is a wasteful number, since it uses less digits than its factorization.

72621065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 72621065 is about 8521.7993991879. The cubic root of 72621065 is about 417.2095150282.

The spelling of 72621065 in words is "seventy-two million, six hundred twenty-one thousand, sixty-five".