72621124 has 12 divisors (see below), whose sum is σ = 127153404. Its totient is φ = 36291584.

The previous prime is 72621089. The next prime is 72621139. The reversal of 72621124 is 42112627.

It can be written as a sum of positive squares in 2 ways, for example, as 26625600 + 45995524 = 5160^2 + 6782^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7212 + ... + 14044.

It is an arithmetic number, because the mean of its divisors is an integer number (10596117).

Almost surely, 2^72621124 is an apocalyptic number.

It is an amenable number.

72621124 is a deficient number, since it is larger than the sum of its proper divisors (54532280).

72621124 is a wasteful number, since it uses less digits than its factorization.

72621124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9494 (or 9492 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 72621124 is about 8521.8028608975. The cubic root of 72621124 is about 417.2096280136.

The spelling of 72621124 in words is "seventy-two million, six hundred twenty-one thousand, one hundred twenty-four".