12691992 has 16 divisors (see below), whose sum is σ = 31730040. Its totient is φ = 4230656.

The previous prime is 12691957. The next prime is 12691997. The reversal of 12691992 is 29919621.

It is a super-2 number, since 2×12691992² = 322173321856128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12691992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12691997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264393 + ... + 264440.

Almost surely, 2^12691992 is an apocalyptic number.

12691992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12691992 is an abundant number, since it is smaller than the sum of its proper divisors (19038048).

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

12691992 is a wasteful number, since it uses less digits than its factorization.

12691992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528842 (or 528838 counting only the distinct ones).

The product of its digits is 17496, while the sum is 39.

The square root of 12691992 is about 3562.5822095778. The cubic root of 12691992 is about 233.2616069786.

The spelling of 12691992 in words is "twelve million, six hundred ninety-one thousand, nine hundred ninety-two".