12642669 has 32 divisors (see below), whose sum is σ = 20384000. Its totient is φ = 7698240.

The previous prime is 12642659. The next prime is 12642691. The reversal of 12642669 is 96624621.

12642669 is a `hidden beast` number, since 1 + 2 + 642 + 6 + 6 + 9 = 666.

12642669 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12642669 - 2⁷ = 12642541 is a prime.

It is a super-2 number, since 2×12642669² = 319674158887122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63432 + ... + 63630.

It is an arithmetic number, because the mean of its divisors is an integer number (637000).

Almost surely, 2^12642669 is an apocalyptic number.

It is an amenable number.

12642669 is a deficient number, since it is larger than the sum of its proper divisors (7741331).

12642669 is a wasteful number, since it uses less digits than its factorization.

12642669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 396 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 12642669 is about 3555.6531045646. The cubic root of 12642669 is about 232.9590514223.

The spelling of 12642669 in words is "twelve million, six hundred forty-two thousand, six hundred sixty-nine".