13271591 has 4 divisors (see below), whose sum is σ = 13420800. Its totient is φ = 13122384.

The previous prime is 13271551. The next prime is 13271593. The reversal of 13271591 is 19517231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13271591 - 2⁶ = 13271527 is a prime.

It is a super-2 number, since 2×13271591² = 352270255342562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13271593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74471 + ... + 74648.

It is an arithmetic number, because the mean of its divisors is an integer number (3355200).

Almost surely, 2^13271591 is an apocalyptic number.

13271591 is a deficient number, since it is larger than the sum of its proper divisors (149209).

13271591 is an equidigital number, since it uses as much as digits as its factorization.

13271591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149208.

The product of its digits is 1890, while the sum is 29.

The square root of 13271591 is about 3643.0194893797. The cubic root of 13271591 is about 236.7596357176.

The spelling of 13271591 in words is "thirteen million, two hundred seventy-one thousand, five hundred ninety-one".