12557224 has 16 divisors (see below), whose sum is σ = 23584320. Its totient is φ = 6268080.

The previous prime is 12557213. The next prime is 12557227. The reversal of 12557224 is 42275521.

It is a junction number, because it is equal to n+sod(n) for n = 12557192 and 12557201.

It is not an unprimeable number, because it can be changed into a prime (12557227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6427 + ... + 8149.

It is an arithmetic number, because the mean of its divisors is an integer number (1474020).

Almost surely, 2^12557224 is an apocalyptic number.

It is an amenable number.

12557224 is a deficient number, since it is larger than the sum of its proper divisors (11027096).

12557224 is a wasteful number, since it uses less digits than its factorization.

12557224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640 (or 2636 counting only the distinct ones).

The product of its digits is 5600, while the sum is 28.

The square root of 12557224 is about 3543.6173608334. The cubic root of 12557224 is about 232.4330496712.

The spelling of 12557224 in words is "twelve million, five hundred fifty-seven thousand, two hundred twenty-four".