12811224 has 16 divisors (see below), whose sum is σ = 32028120. Its totient is φ = 4270400.

The previous prime is 12811223. The next prime is 12811231. The reversal of 12811224 is 42211821.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12811224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12811223) 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, 266877 + ... + 266924.

Almost surely, 2^12811224 is an apocalyptic number.

It is an amenable number.

12811224 is an abundant number, since it is smaller than the sum of its proper divisors (19216896).

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

12811224 is a wasteful number, since it uses less digits than its factorization.

12811224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533810 (or 533806 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

The square root of 12811224 is about 3579.2770219697. The cubic root of 12811224 is about 233.9897723633.

The spelling of 12811224 in words is "twelve million, eight hundred eleven thousand, two hundred twenty-four".