12811424 has 24 divisors (see below), whose sum is σ = 25460820. Its totient is φ = 6345216.

The previous prime is 12811423. The next prime is 12811457. The reversal of 12811424 is 42411821.

It can be written as a sum of positive squares in 2 ways, for example, as 12475024 + 336400 = 3532^2 + 580^2 .

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 12811424.

It is not an unprimeable number, because it can be changed into a prime (12811423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1652 + ... + 5324.

Almost surely, 2^12811424 is an apocalyptic number.

It is an amenable number.

12811424 is a deficient number, since it is larger than the sum of its proper divisors (12649396).

12811424 is a wasteful number, since it uses less digits than its factorization.

12811424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792 (or 3784 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 12811424 is about 3579.3049604637. The cubic root of 12811424 is about 233.9909899860.

The spelling of 12811424 in words is "twelve million, eight hundred eleven thousand, four hundred twenty-four".