1315361257 has 8 divisors (see below), whose sum is σ = 1503490496. Its totient is φ = 1127287152.

The previous prime is 1315361251. The next prime is 1315361269. The reversal of 1315361257 is 7521635131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1315361257 - 2¹⁵ = 1315328489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315361251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79018 + ... + 94204.

It is an arithmetic number, because the mean of its divisors is an integer number (187936312).

Almost surely, 2^1315361257 is an apocalyptic number.

It is an amenable number.

1315361257 is a deficient number, since it is larger than the sum of its proper divisors (188129239).

1315361257 is a wasteful number, since it uses less digits than its factorization.

1315361257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27567.

The product of its digits is 18900, while the sum is 34.

The square root of 1315361257 is about 36267.9094655316. The cubic root of 1315361257 is about 1095.6748221133.

Adding to 1315361257 its reverse (7521635131), we get a palindrome (8836996388).

The spelling of 1315361257 in words is "one billion, three hundred fifteen million, three hundred sixty-one thousand, two hundred fifty-seven".