1315477257 has 4 divisors (see below), whose sum is σ = 1753969680. Its totient is φ = 876984836.

The previous prime is 1315477253. The next prime is 1315477259. The reversal of 1315477257 is 7527745131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1315477257 - 2² = 1315477253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1315477253) 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, 219246207 + ... + 219246212.

It is an arithmetic number, because the mean of its divisors is an integer number (438492420).

Almost surely, 2^1315477257 is an apocalyptic number.

It is an amenable number.

1315477257 is a deficient number, since it is larger than the sum of its proper divisors (438492423).

1315477257 is an equidigital number, since it uses as much as digits as its factorization.

1315477257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438492422.

The product of its digits is 205800, while the sum is 42.

The square root of 1315477257 is about 36269.5086401787. The cubic root of 1315477257 is about 1095.7070298795.

The spelling of 1315477257 in words is "one billion, three hundred fifteen million, four hundred seventy-seven thousand, two hundred fifty-seven".