72646251 has 8 divisors (see below), whose sum is σ = 97503744. Its totient is φ = 48109800.

The previous prime is 72646243. The next prime is 72646261. The reversal of 72646251 is 15264627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72646251 - 2³ = 72646243 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72646261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79731 + ... + 80636.

It is an arithmetic number, because the mean of its divisors is an integer number (12187968).

Almost surely, 2^72646251 is an apocalyptic number.

72646251 is a deficient number, since it is larger than the sum of its proper divisors (24857493).

72646251 is a wasteful number, since it uses less digits than its factorization.

72646251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160521.

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

The square root of 72646251 is about 8523.2770106339. The cubic root of 72646251 is about 417.2577408165.

The spelling of 72646251 in words is "seventy-two million, six hundred forty-six thousand, two hundred fifty-one".