9120724 has 12 divisors (see below), whose sum is σ = 16013844. Its totient is φ = 4545344.

The previous prime is 9120701. The next prime is 9120739. The reversal of 9120724 is 4270219.

9120724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 8584900 = 732^2 + 2930^2 .

It is a congruent number.

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, 2329 + ... + 4864.

It is an arithmetic number, because the mean of its divisors is an integer number (1334487).

Almost surely, 2^9120724 is an apocalyptic number.

It is an amenable number.

9120724 is a deficient number, since it is larger than the sum of its proper divisors (6893120).

9120724 is a wasteful number, since it uses less digits than its factorization.

9120724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7514 (or 7512 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 9120724 is about 3020.0536419077. The cubic root of 9120724 is about 208.9343138892.

The spelling of 9120724 in words is "nine million, one hundred twenty thousand, seven hundred twenty-four".