13158591 has 4 divisors (see below), whose sum is σ = 17544792. Its totient is φ = 8772392.

The previous prime is 13158577. The next prime is 13158617. The reversal of 13158591 is 19585131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19585131 = 3 ⋅6528377.

It is a cyclic number.

It is not a de Polignac number, because 13158591 - 2¹⁰ = 13157567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13158521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2193096 + ... + 2193101.

It is an arithmetic number, because the mean of its divisors is an integer number (4386198).

Almost surely, 2^13158591 is an apocalyptic number.

13158591 is a deficient number, since it is larger than the sum of its proper divisors (4386201).

13158591 is an equidigital number, since it uses as much as digits as its factorization.

13158591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386200.

The product of its digits is 5400, while the sum is 33.

The square root of 13158591 is about 3627.4772225336. The cubic root of 13158591 is about 236.0857619455.

The spelling of 13158591 in words is "thirteen million, one hundred fifty-eight thousand, five hundred ninety-one".