12688895 has 4 divisors (see below), whose sum is σ = 15226680. Its totient is φ = 10151112.

The previous prime is 12688877. The next prime is 12688909. The reversal of 12688895 is 59888621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12688895 is a prime.

It is a super-2 number, since 2×12688895² = 322016112642050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268885 + ... + 1268894.

It is an arithmetic number, because the mean of its divisors is an integer number (3806670).

Almost surely, 2^12688895 is an apocalyptic number.

12688895 is a deficient number, since it is larger than the sum of its proper divisors (2537785).

12688895 is an equidigital number, since it uses as much as digits as its factorization.

12688895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537784.

The product of its digits is 276480, while the sum is 47.

The square root of 12688895 is about 3562.1475264228. The cubic root of 12688895 is about 233.2426325480.

The spelling of 12688895 in words is "twelve million, six hundred eighty-eight thousand, eight hundred ninety-five".