12688995 has 32 divisors (see below), whose sum is σ = 22581504. Its totient is φ = 6032000.

The previous prime is 12688993. The next prime is 12689003. The reversal of 12688995 is 59988621.

It is a happy number.

12688995 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12688995 - 2¹ = 12688993 is a prime.

It is a super-2 number, since 2×12688995² = 322021188220050, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (12688993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8020 + ... + 9470.

It is an arithmetic number, because the mean of its divisors is an integer number (705672).

Almost surely, 2^12688995 is an apocalyptic number.

12688995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12688995 is a deficient number, since it is larger than the sum of its proper divisors (9892509).

12688995 is a wasteful number, since it uses less digits than its factorization.

12688995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523.

The product of its digits is 311040, while the sum is 48.

The square root of 12688995 is about 3562.1615628716. The cubic root of 12688995 is about 233.2432452676.

The spelling of 12688995 in words is "twelve million, six hundred eighty-eight thousand, nine hundred ninety-five".