13260591 has 20 divisors (see below), whose sum is σ = 20451904. Its totient is φ = 8553600.

The previous prime is 13260551. The next prime is 13260601. The reversal of 13260591 is 19506231.

13260591 is a `hidden beast` number, since 13 + 2 + 60 + 591 = 666.

It is not a de Polignac number, because 13260591 - 2⁷ = 13260463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13260521) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 130 + ... + 5151.

Almost surely, 2^13260591 is an apocalyptic number.

13260591 is a deficient number, since it is larger than the sum of its proper divisors (7191313).

13260591 is an equidigital number, since it uses as much as digits as its factorization.

13260591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324 (or 5315 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 13260591 is about 3641.5094397791. The cubic root of 13260591 is about 236.6942058368.

The spelling of 13260591 in words is "thirteen million, two hundred sixty thousand, five hundred ninety-one".