13266391 has 8 divisors (see below), whose sum is σ = 13502720. Its totient is φ = 13031928.

The previous prime is 13266371. The next prime is 13266397. The reversal of 13266391 is 19366231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13266391 - 2⁵ = 13266359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13266397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23980 + ... + 24526.

It is an arithmetic number, because the mean of its divisors is an integer number (1687840).

Almost surely, 2^13266391 is an apocalyptic number.

13266391 is a deficient number, since it is larger than the sum of its proper divisors (236329).

13266391 is an equidigital number, since it uses as much as digits as its factorization.

13266391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933.

The product of its digits is 5832, while the sum is 31.

The square root of 13266391 is about 3642.3057257732. The cubic root of 13266391 is about 236.7287097361.

The spelling of 13266391 in words is "thirteen million, two hundred sixty-six thousand, three hundred ninety-one".