1311339 has 4 divisors (see below), whose sum is σ = 1748456. Its totient is φ = 874224.

The previous prime is 1311311. The next prime is 1311341. The reversal of 1311339 is 9331131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9331131 = 3 ⋅3110377.

It is not a de Polignac number, because 1311339 - 2⁵ = 1311307 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311239) 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, 218554 + ... + 218559.

It is an arithmetic number, because the mean of its divisors is an integer number (437114).

2^1311339 is an apocalyptic number.

1311339 is a deficient number, since it is larger than the sum of its proper divisors (437117).

1311339 is an equidigital number, since it uses as much as digits as its factorization.

1311339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437116.

The product of its digits is 243, while the sum is 21.

The square root of 1311339 is about 1145.1371096947. The cubic root of 1311339 is about 109.4556856610.

The spelling of 1311339 in words is "one million, three hundred eleven thousand, three hundred thirty-nine".