12811172 has 24 divisors (see below), whose sum is σ = 24548832. Its totient is φ = 5801600.

The previous prime is 12811163. The next prime is 12811177. The reversal of 12811172 is 27111821.

It is a super-2 number, since 2×12811172² = 328252256027168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12811177) 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 in 7 ways as a sum of consecutive naturals, for example, 21308 + ... + 21900.

It is an arithmetic number, because the mean of its divisors is an integer number (1022868).

Almost surely, 2^12811172 is an apocalyptic number.

It is an amenable number.

12811172 is a deficient number, since it is larger than the sum of its proper divisors (11737660).

12811172 is a wasteful number, since it uses less digits than its factorization.

12811172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1097 counting only the distinct ones).

The product of its digits is 224, while the sum is 23.

The square root of 12811172 is about 3579.2697579255. The cubic root of 12811172 is about 233.9894557793.

Adding to 12811172 its reverse (27111821), we get a palindrome (39922993).

The spelling of 12811172 in words is "twelve million, eight hundred eleven thousand, one hundred seventy-two".