12886905 has 16 divisors (see below), whose sum is σ = 20772864. Its totient is φ = 6821760.

The previous prime is 12886891. The next prime is 12886919. The reversal of 12886905 is 50968821.

12886905 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12886891) and next prime (12886919).

It is not a de Polignac number, because 12886905 - 2⁸ = 12886649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1081 + ... + 5190.

It is an arithmetic number, because the mean of its divisors is an integer number (1298304).

Almost surely, 2^12886905 is an apocalyptic number.

12886905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12886905 is a deficient number, since it is larger than the sum of its proper divisors (7885959).

12886905 is a wasteful number, since it uses less digits than its factorization.

12886905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6416.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 12886905 is about 3589.8335616014. The cubic root of 12886905 is about 234.4496249480.

The spelling of 12886905 in words is "twelve million, eight hundred eighty-six thousand, nine hundred five".