12811953 has 32 divisors (see below), whose sum is σ = 21888000. Its totient is φ = 6471360.

The previous prime is 12811937. The next prime is 12811957. The reversal of 12811953 is 35911821.

It is not a de Polignac number, because 12811953 - 2⁴ = 12811937 is a prime.

It is a super-2 number, since 2×12811953² = 328292279348418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12811953.

It is not an unprimeable number, because it can be changed into a prime (12811957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7798 + ... + 9296.

It is an arithmetic number, because the mean of its divisors is an integer number (684000).

Almost surely, 2^12811953 is an apocalyptic number.

It is an amenable number.

12811953 is a deficient number, since it is larger than the sum of its proper divisors (9076047).

12811953 is a wasteful number, since it uses less digits than its factorization.

12811953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557.

The product of its digits is 2160, while the sum is 30.

The square root of 12811953 is about 3579.3788567292. The cubic root of 12811953 is about 233.9942105369.

The spelling of 12811953 in words is "twelve million, eight hundred eleven thousand, nine hundred fifty-three".