12663975 has 24 divisors (see below), whose sum is σ = 22042240. Its totient is φ = 6397920.

The previous prime is 12663971. The next prime is 12663977. The reversal of 12663975 is 57936621.

12663975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12663975 - 2² = 12663971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3019 + ... + 5868.

Almost surely, 2^12663975 is an apocalyptic number.

12663975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12663975 is a deficient number, since it is larger than the sum of its proper divisors (9378265).

12663975 is a wasteful number, since it uses less digits than its factorization.

12663975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8919 (or 8914 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 12663975 is about 3558.6479173978. The cubic root of 12663975 is about 233.0898423695.

The spelling of 12663975 in words is "twelve million, six hundred sixty-three thousand, nine hundred seventy-five".