12811892 has 12 divisors (see below), whose sum is σ = 22448580. Its totient is φ = 6398016.

The previous prime is 12811889. The next prime is 12811907. The reversal of 12811892 is 29811821.

It can be written as a sum of positive squares in 2 ways, for example, as 729316 + 12082576 = 854^2 + 3476^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3098 + ... + 5934.

It is an arithmetic number, because the mean of its divisors is an integer number (1870715).

Almost surely, 2^12811892 is an apocalyptic number.

It is an amenable number.

12811892 is a deficient number, since it is larger than the sum of its proper divisors (9636688).

12811892 is a wasteful number, since it uses less digits than its factorization.

12811892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970 (or 3968 counting only the distinct ones).

The product of its digits is 2304, while the sum is 32.

The square root of 12811892 is about 3579.3703356875. The cubic root of 12811892 is about 233.9938391735.

The spelling of 12811892 in words is "twelve million, eight hundred eleven thousand, eight hundred ninety-two".