1313042257 has 2 divisors, whose sum is σ = 1313042258. Its totient is φ = 1313042256.

The previous prime is 1313042219. The next prime is 1313042267. The reversal of 1313042257 is 7522403131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1195015761 + 118026496 = 34569^2 + 10864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313042257 - 2²⁷ = 1178824529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313042207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656521128 + 656521129.

It is an arithmetic number, because the mean of its divisors is an integer number (656521129).

Almost surely, 2^1313042257 is an apocalyptic number.

It is an amenable number.

1313042257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313042257 is an equidigital number, since it uses as much as digits as its factorization.

1313042257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1313042257 is about 36235.9249502479. The cubic root of 1313042257 is about 1095.0305467455.

Adding to 1313042257 its reverse (7522403131), we get a palindrome (8835445388).

The spelling of 1313042257 in words is "one billion, three hundred thirteen million, forty-two thousand, two hundred fifty-seven".