12642977 has 4 divisors (see below), whose sum is σ = 12742656. Its totient is φ = 12543300.

The previous prime is 12642919. The next prime is 12642979. The reversal of 12642977 is 77924621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12642977 - 2⁶ = 12642913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12642977.

It is not an unprimeable number, because it can be changed into a prime (12642979) 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, 49649 + ... + 49902.

It is an arithmetic number, because the mean of its divisors is an integer number (3185664).

Almost surely, 2^12642977 is an apocalyptic number.

It is an amenable number.

12642977 is a deficient number, since it is larger than the sum of its proper divisors (99679).

12642977 is an equidigital number, since it uses as much as digits as its factorization.

12642977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99678.

The product of its digits is 42336, while the sum is 38.

The square root of 12642977 is about 3555.6964156126. The cubic root of 12642977 is about 232.9609431854.

The spelling of 12642977 in words is "twelve million, six hundred forty-two thousand, nine hundred seventy-seven".