12975813 has 6 divisors (see below), whose sum is σ = 18742854. Its totient is φ = 8650536.

The previous prime is 12975797. The next prime is 12975821. The reversal of 12975813 is 31857921.

It can be written as a sum of positive squares in only one way, i.e., 11716929 + 1258884 = 3423^2 + 1122^2 .

It is not a de Polignac number, because 12975813 - 2⁴ = 12975797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12975113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720870 + ... + 720887.

It is an arithmetic number, because the mean of its divisors is an integer number (3123809).

Almost surely, 2^12975813 is an apocalyptic number.

It is an amenable number.

12975813 is a deficient number, since it is larger than the sum of its proper divisors (5767041).

12975813 is a wasteful number, since it uses less digits than its factorization.

12975813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441763 (or 1441760 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12975813 is about 3602.1955804759. The cubic root of 12975813 is about 234.9875532868.

The spelling of 12975813 in words is "twelve million, nine hundred seventy-five thousand, eight hundred thirteen".