12996891 has 12 divisors (see below), whose sum is σ = 19877832. Its totient is φ = 8154816.

The previous prime is 12996881. The next prime is 12996911. The reversal of 12996891 is 19869921.

It is not a de Polignac number, because 12996891 - 2⁵ = 12996859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12996871) 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 11 ways as a sum of consecutive naturals, for example, 42321 + ... + 42626.

It is an arithmetic number, because the mean of its divisors is an integer number (1656486).

Almost surely, 2^12996891 is an apocalyptic number.

12996891 is a deficient number, since it is larger than the sum of its proper divisors (6880941).

12996891 is a wasteful number, since it uses less digits than its factorization.

12996891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84970 (or 84967 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 12996891 is about 3605.1201089561. The cubic root of 12996891 is about 235.1147229198.

It can be divided in two parts, 129 and 96891, that added together give a triangular number (97020 = T₄₄₀).

The spelling of 12996891 in words is "twelve million, nine hundred ninety-six thousand, eight hundred ninety-one".