12906891 has 16 divisors (see below), whose sum is σ = 19314720. Its totient is φ = 8517600.

The previous prime is 12906863. The next prime is 12906937. The reversal of 12906891 is 19860921.

12906891 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 12906891 - 2⁹ = 12906379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12902891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361 + ... + 5093.

It is an arithmetic number, because the mean of its divisors is an integer number (1207170).

Almost surely, 2^12906891 is an apocalyptic number.

12906891 is a deficient number, since it is larger than the sum of its proper divisors (6407829).

12906891 is a wasteful number, since it uses less digits than its factorization.

12906891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843 (or 4837 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 12906891 is about 3592.6161776622. The cubic root of 12906891 is about 234.5707631621.

The spelling of 12906891 in words is "twelve million, nine hundred six thousand, eight hundred ninety-one".