12971812 has 24 divisors (see below), whose sum is σ = 26498304. Its totient is φ = 5440512.

The previous prime is 12971797. The next prime is 12971831. The reversal of 12971812 is 21817921.

It is an unprimeable number.

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, 3613 + ... + 6244.

It is an arithmetic number, because the mean of its divisors is an integer number (1104096).

Almost surely, 2^12971812 is an apocalyptic number.

It is an amenable number.

12971812 is an abundant number, since it is smaller than the sum of its proper divisors (13526492).

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

12971812 is a wasteful number, since it uses less digits than its factorization.

12971812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9915 (or 9913 counting only the distinct ones).

The product of its digits is 2016, while the sum is 31.

The square root of 12971812 is about 3601.6401819171. The cubic root of 12971812 is about 234.9633985549.

The spelling of 12971812 in words is "twelve million, nine hundred seventy-one thousand, eight hundred twelve".