12912113 has 6 divisors (see below), whose sum is σ = 13048866. Its totient is φ = 12776112.

The previous prime is 12912103. The next prime is 12912139. The reversal of 12912113 is 31121921.

It can be written as a sum of positive squares in only one way, i.e., 11404129 + 1507984 = 3377^2 + 1228^2 .

It is not a de Polignac number, because 12912113 - 2²² = 8717809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12912103) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 41906 + ... + 42212.

It is an arithmetic number, because the mean of its divisors is an integer number (2174811).

Almost surely, 2^12912113 is an apocalyptic number.

It is an amenable number.

12912113 is a deficient number, since it is larger than the sum of its proper divisors (136753).

12912113 is an frugal number, since it uses more digits than its factorization.

12912113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 444 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

The square root of 12912113 is about 3593.3428725909. The cubic root of 12912113 is about 234.6023938975.

The spelling of 12912113 in words is "twelve million, nine hundred twelve thousand, one hundred thirteen".