12811136 has 32 divisors (see below), whose sum is σ = 27489000. Its totient is φ = 5912064.

The previous prime is 12811109. The next prime is 12811151. The reversal of 12811136 is 63111821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×12811136² = 328250411220992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 2186 + ... + 5513.

Almost surely, 2^12811136 is an apocalyptic number.

12811136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12811136 is an abundant number, since it is smaller than the sum of its proper divisors (14677864).

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

12811136 is an equidigital number, since it uses as much as digits as its factorization.

12811136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7726 (or 7714 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 12811136 is about 3579.2647289632. The cubic root of 12811136 is about 233.9892366053.

Adding to 12811136 its reverse (63111821), we get a palindrome (75922957).

The spelling of 12811136 in words is "twelve million, eight hundred eleven thousand, one hundred thirty-six".