1312613 has 4 divisors (see below), whose sum is σ = 1330668. Its totient is φ = 1294560.

The previous prime is 1312603. The next prime is 1312637. The reversal of 1312613 is 3162131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1117249 + 195364 = 1057^2 + 442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312591 and 1312600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312603) 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, 8918 + ... + 9063.

It is an arithmetic number, because the mean of its divisors is an integer number (332667).

2^1312613 is an apocalyptic number.

It is an amenable number.

1312613 is a deficient number, since it is larger than the sum of its proper divisors (18055).

1312613 is an equidigital number, since it uses as much as digits as its factorization.

1312613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18054.

The product of its digits is 108, while the sum is 17.

The square root of 1312613 is about 1145.6932399207. The cubic root of 1312613 is about 109.4911205382.

Adding to 1312613 its reverse (3162131), we get a palindrome (4474744).

It can be divided in two parts, 131 and 2613, that added together give a cube (2744 = 14³).

The spelling of 1312613 in words is "one million, three hundred twelve thousand, six hundred thirteen".