1313478265 has 16 divisors (see below), whose sum is σ = 1809961920. Its totient is φ = 904979520.

The previous prime is 1313478263. The next prime is 1313478329. The reversal of 1313478265 is 5628743131.

It is not a de Polignac number, because 1313478265 - 2¹ = 1313478263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313478263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627414 + ... + 629503.

It is an arithmetic number, because the mean of its divisors is an integer number (113122620).

Almost surely, 2^1313478265 is an apocalyptic number.

It is an amenable number.

1313478265 is a deficient number, since it is larger than the sum of its proper divisors (496483655).

1313478265 is a wasteful number, since it uses less digits than its factorization.

1313478265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256952.

The product of its digits is 120960, while the sum is 40.

The square root of 1313478265 is about 36241.9406903107. The cubic root of 1313478265 is about 1095.1517383877.

The spelling of 1313478265 in words is "one billion, three hundred thirteen million, four hundred seventy-eight thousand, two hundred sixty-five".