72161274 has 16 divisors (see below), whose sum is σ = 144406080. Its totient is φ = 24039840.

The previous prime is 72161269. The next prime is 72161317. The reversal of 72161274 is 47216127.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17262 + ... + 21030.

It is an arithmetic number, because the mean of its divisors is an integer number (9025380).

Almost surely, 2^72161274 is an apocalyptic number.

72161274 is an abundant number, since it is smaller than the sum of its proper divisors (72244806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72161274 is a wasteful number, since it uses less digits than its factorization.

72161274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6965.

The product of its digits is 4704, while the sum is 30.

The square root of 72161274 is about 8494.7792202034. The cubic root of 72161274 is about 416.3271472767.

The spelling of 72161274 in words is "seventy-two million, one hundred sixty-one thousand, two hundred seventy-four".