12997812 has 12 divisors (see below), whose sum is σ = 30328256. Its totient is φ = 4332600.

The previous prime is 12997801. The next prime is 12997847. The reversal of 12997812 is 21879921.

It is a tau number, because it is divible by the number of its divisors (12).

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, 541564 + ... + 541587.

Almost surely, 2^12997812 is an apocalyptic number.

12997812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12997812 is an abundant number, since it is smaller than the sum of its proper divisors (17330444).

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

12997812 is a wasteful number, since it uses less digits than its factorization.

12997812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083158 (or 1083156 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 12997812 is about 3605.2478416886. The cubic root of 12997812 is about 235.1202764414.

The spelling of 12997812 in words is "twelve million, nine hundred ninety-seven thousand, eight hundred twelve".