12642975 has 36 divisors (see below), whose sum is σ = 22951656. Its totient is φ = 6651840.

The previous prime is 12642919. The next prime is 12642979. The reversal of 12642975 is 57924621.

12642975 is a `hidden beast` number, since 1 + 2 + 642 + 9 + 7 + 5 = 666.

It is not a de Polignac number, because 12642975 - 2¹⁵ = 12610207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18337 + ... + 19013.

It is an arithmetic number, because the mean of its divisors is an integer number (637546).

Almost surely, 2^12642975 is an apocalyptic number.

12642975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12642975 is a deficient number, since it is larger than the sum of its proper divisors (10308681).

12642975 is a wasteful number, since it uses less digits than its factorization.

12642975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 768 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 12642975 is about 3555.6961343737. The cubic root of 12642975 is about 232.9609309013.

The spelling of 12642975 in words is "twelve million, six hundred forty-two thousand, nine hundred seventy-five".