1315874761 has 4 divisors (see below), whose sum is σ = 1315973392. Its totient is φ = 1315776132.

The previous prime is 1315874753. The next prime is 1315874809. The reversal of 1315874761 is 1674785131.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1315874761 - 2³ = 1315874753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315874711) 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, 25455 + ... + 57268.

It is an arithmetic number, because the mean of its divisors is an integer number (328993348).

Almost surely, 2^1315874761 is an apocalyptic number.

It is an amenable number.

1315874761 is a deficient number, since it is larger than the sum of its proper divisors (98631).

1315874761 is an equidigital number, since it uses as much as digits as its factorization.

1315874761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98630.

The product of its digits is 141120, while the sum is 43.

The square root of 1315874761 is about 36274.9880909698. The cubic root of 1315874761 is about 1095.8173837610.

The spelling of 1315874761 in words is "one billion, three hundred fifteen million, eight hundred seventy-four thousand, seven hundred sixty-one".