13266891 has 24 divisors (see below), whose sum is σ = 21630960. Its totient is φ = 7761600.

The previous prime is 13266889. The next prime is 13266901. The reversal of 13266891 is 19866231.

It is not a de Polignac number, because 13266891 - 2¹ = 13266889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13266691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (901290).

Almost surely, 2^13266891 is an apocalyptic number.

13266891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13266891 is a deficient number, since it is larger than the sum of its proper divisors (8364069).

13266891 is a wasteful number, since it uses less digits than its factorization.

13266891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667 (or 4664 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 13266891 is about 3642.3743629671. The cubic root of 13266891 is about 236.7316837393.

The spelling of 13266891 in words is "thirteen million, two hundred sixty-six thousand, eight hundred ninety-one".