12911224 has 32 divisors (see below), whose sum is σ = 25362720. Its totient is φ = 6155136.

The previous prime is 12911219. The next prime is 12911237. The reversal of 12911224 is 42211921.

It is a junction number, because it is equal to n+sod(n) for n = 12911195 and 12911204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15277 + ... + 16099.

It is an arithmetic number, because the mean of its divisors is an integer number (792585).

Almost surely, 2^12911224 is an apocalyptic number.

It is an amenable number.

12911224 is a deficient number, since it is larger than the sum of its proper divisors (12451496).

12911224 is a wasteful number, since it uses less digits than its factorization.

12911224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 915 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 12911224 is about 3593.2191694913. The cubic root of 12911224 is about 234.5970096429.

The spelling of 12911224 in words is "twelve million, nine hundred eleven thousand, two hundred twenty-four".