1313431 has 4 divisors (see below), whose sum is σ = 1501072. Its totient is φ = 1125792.

The previous prime is 1313423. The next prime is 1313443. The reversal of 1313431 is 1343131.

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 1313431 - 2³ = 1313423 is a prime.

It is a super-2 number, since 2×1313431² = 3450201983522, 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 (1313731) 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, 93810 + ... + 93823.

It is an arithmetic number, because the mean of its divisors is an integer number (375268).

2^1313431 is an apocalyptic number.

1313431 is a deficient number, since it is larger than the sum of its proper divisors (187641).

1313431 is an equidigital number, since it uses as much as digits as its factorization.

1313431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187640.

The product of its digits is 108, while the sum is 16.

The square root of 1313431 is about 1146.0501734217. The cubic root of 1313431 is about 109.5138602028.

Adding to 1313431 its reverse (1343131), we get a palindrome (2656562).

The spelling of 1313431 in words is "one million, three hundred thirteen thousand, four hundred thirty-one".