12157224 has 16 divisors (see below), whose sum is σ = 30393120. Its totient is φ = 4052400.

The previous prime is 12157219. The next prime is 12157237. The reversal of 12157224 is 42275121.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 506551 = 12157224 / (1 + 2 + 1 + 5 + 7 + 2 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 12157194 and 12157203.

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, 253252 + ... + 253299.

It is an arithmetic number, because the mean of its divisors is an integer number (1899570).

Almost surely, 2^12157224 is an apocalyptic number.

It is an amenable number.

12157224 is an abundant number, since it is smaller than the sum of its proper divisors (18235896).

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

12157224 is a wasteful number, since it uses less digits than its factorization.

12157224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506560 (or 506556 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 12157224 is about 3486.7210958148. The cubic root of 12157224 is about 229.9383829902.

The spelling of 12157224 in words is "twelve million, one hundred fifty-seven thousand, two hundred twenty-four".