1315291 has 2 divisors, whose sum is σ = 1315292. Its totient is φ = 1315290.

The previous prime is 1315289. The next prime is 1315297. The reversal of 1315291 is 1925131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1315291 - 2¹ = 1315289 is a prime.

Together with 1315289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1315297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657645 + 657646.

It is an arithmetic number, because the mean of its divisors is an integer number (657646).

2^1315291 is an apocalyptic number.

1315291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315291 is an equidigital number, since it uses as much as digits as its factorization.

1315291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 22.

The square root of 1315291 is about 1146.8613691288. The cubic root of 1315291 is about 109.5655314115.

The spelling of 1315291 in words is "one million, three hundred fifteen thousand, two hundred ninety-one".