12811492 has 6 divisors (see below), whose sum is σ = 22420118. Its totient is φ = 6405744.

The previous prime is 12811481. The next prime is 12811493. The reversal of 12811492 is 29411821.

It can be written as a sum of positive squares in only one way, i.e., 12787776 + 23716 = 3576^2 + 154^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12811492.

It is not an unprimeable number, because it can be changed into a prime (12811493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1601433 + ... + 1601440.

Almost surely, 2^12811492 is an apocalyptic number.

It is an amenable number.

12811492 is a deficient number, since it is larger than the sum of its proper divisors (9608626).

12811492 is a wasteful number, since it uses less digits than its factorization.

12811492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202877 (or 3202875 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 12811492 is about 3579.3144595020. The cubic root of 12811492 is about 233.9914039748.

The spelling of 12811492 in words is "twelve million, eight hundred eleven thousand, four hundred ninety-two".