1315309 has 2 divisors, whose sum is σ = 1315310. Its totient is φ = 1315308.

The previous prime is 1315297. The next prime is 1315367. The reversal of 1315309 is 9035131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 459684 = 925^2 + 678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1315309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657654 + 657655.

It is an arithmetic number, because the mean of its divisors is an integer number (657655).

2^1315309 is an apocalyptic number.

It is an amenable number.

1315309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315309 is an equidigital number, since it uses as much as digits as its factorization.

1315309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 22.

The square root of 1315309 is about 1146.8692166067. The cubic root of 1315309 is about 109.5660312174.

The spelling of 1315309 in words is "one million, three hundred fifteen thousand, three hundred nine".