1313591 has 4 divisors (see below), whose sum is σ = 1316184. Its totient is φ = 1311000.

The previous prime is 1313579. The next prime is 1313597. The reversal of 1313591 is 1953131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1953131 = 1223 ⋅1597.

It is a cyclic number.

It is not a de Polignac number, because 1313591 - 2¹⁰ = 1312567 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 (1313597) 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, 260 + ... + 1641.

It is an arithmetic number, because the mean of its divisors is an integer number (329046).

2^1313591 is an apocalyptic number.

1313591 is a deficient number, since it is larger than the sum of its proper divisors (2593).

1313591 is an equidigital number, since it uses as much as digits as its factorization.

1313591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592.

The product of its digits is 405, while the sum is 23.

The square root of 1313591 is about 1146.1199762678. The cubic root of 1313591 is about 109.5183069549.

The spelling of 1313591 in words is "one million, three hundred thirteen thousand, five hundred ninety-one".