1315247273 has 4 divisors (see below), whose sum is σ = 1328016768. Its totient is φ = 1302477780.

The previous prime is 1315247267. The next prime is 1315247309. The reversal of 1315247273 is 3727425131.

It is a happy number.

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 1315247273 - 2⁴ = 1315247257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1315247573) 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, 6384593 + ... + 6384798.

It is an arithmetic number, because the mean of its divisors is an integer number (332004192).

Almost surely, 2^1315247273 is an apocalyptic number.

It is an amenable number.

1315247273 is a deficient number, since it is larger than the sum of its proper divisors (12769495).

1315247273 is a wasteful number, since it uses less digits than its factorization.

1315247273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12769494.

The product of its digits is 35280, while the sum is 35.

The square root of 1315247273 is about 36266.3380147486. The cubic root of 1315247273 is about 1095.6431722514.

The spelling of 1315247273 in words is "one billion, three hundred fifteen million, two hundred forty-seven thousand, two hundred seventy-three".