12911870 has 24 divisors (see below), whose sum is σ = 23696712. Its totient is φ = 5065440.

The previous prime is 12911869. The next prime is 12911879. The reversal of 12911870 is 7811921.

12911870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37037 + ... + 37383.

It is an arithmetic number, because the mean of its divisors is an integer number (987363).

Almost surely, 2^12911870 is an apocalyptic number.

12911870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12911870 is a deficient number, since it is larger than the sum of its proper divisors (10784842).

12911870 is an equidigital number, since it uses as much as digits as its factorization.

12911870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 12911870 is about 3593.3090599056. The cubic root of 12911870 is about 234.6009221854.

The spelling of 12911870 in words is "twelve million, nine hundred eleven thousand, eight hundred seventy".