1312366865 has 16 divisors (see below), whose sum is σ = 1628000256. Its totient is φ = 1014552000.

The previous prime is 1312366859. The next prime is 1312366873. The reversal of 1312366865 is 5686632131.

It is not a de Polignac number, because 1312366865 - 2⁴ = 1312366849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107840 + ... + 119390.

It is an arithmetic number, because the mean of its divisors is an integer number (101750016).

Almost surely, 2^1312366865 is an apocalyptic number.

It is an amenable number.

1312366865 is a deficient number, since it is larger than the sum of its proper divisors (315633391).

1312366865 is a wasteful number, since it uses less digits than its factorization.

1312366865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12320.

The product of its digits is 155520, while the sum is 41.

The square root of 1312366865 is about 36226.6043813107. The cubic root of 1312366865 is about 1094.8427635754.

Adding to 1312366865 its reverse (5686632131), we get a palindrome (6998998996).

The spelling of 1312366865 in words is "one billion, three hundred twelve million, three hundred sixty-six thousand, eight hundred sixty-five".