72161474 has 16 divisors (see below), whose sum is σ = 134951616. Its totient is φ = 28114800.

The previous prime is 72161431. The next prime is 72161477. The reversal of 72161474 is 47416127.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72161474.

It is not an unprimeable number, because it can be changed into a prime (72161477) 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, 234137 + ... + 234444.

It is an arithmetic number, because the mean of its divisors is an integer number (8434476).

Almost surely, 2^72161474 is an apocalyptic number.

72161474 is a deficient number, since it is larger than the sum of its proper divisors (62790142).

72161474 is a wasteful number, since it uses less digits than its factorization.

72161474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468601.

The product of its digits is 9408, while the sum is 32.

The square root of 72161474 is about 8494.7909921316. The cubic root of 72161474 is about 416.3275319029.

The spelling of 72161474 in words is "seventy-two million, one hundred sixty-one thousand, four hundred seventy-four".