12647975 has 6 divisors (see below), whose sum is σ = 15683520. Its totient is φ = 10118360.

The previous prime is 12647959. The next prime is 12647989. The reversal of 12647975 is 57974621.

It is not a de Polignac number, because 12647975 - 2⁴ = 12647959 is a prime.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 252935 + ... + 252984.

It is an arithmetic number, because the mean of its divisors is an integer number (2613920).

Almost surely, 2^12647975 is an apocalyptic number.

12647975 is a deficient number, since it is larger than the sum of its proper divisors (3035545).

12647975 is an equidigital number, since it uses as much as digits as its factorization.

12647975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505929 (or 505924 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 12647975 is about 3556.3991620739. The cubic root of 12647975 is about 232.9916370481.

The spelling of 12647975 in words is "twelve million, six hundred forty-seven thousand, nine hundred seventy-five".