1312404303 has 16 divisors (see below), whose sum is σ = 2000549376. Its totient is φ = 749684640.

The previous prime is 1312404299. The next prime is 1312404323. The reversal of 1312404303 is 3034042131.

It is not a de Polignac number, because 1312404303 - 2² = 1312404299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1312404303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312404323) 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, 62518 + ... + 80828.

It is an arithmetic number, because the mean of its divisors is an integer number (125034336).

Almost surely, 2^1312404303 is an apocalyptic number.

1312404303 is a deficient number, since it is larger than the sum of its proper divisors (688145073).

1312404303 is a wasteful number, since it uses less digits than its factorization.

1312404303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21734.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1312404303 is about 36227.1210973215. The cubic root of 1312404303 is about 1094.8531743669.

Adding to 1312404303 its reverse (3034042131), we get a palindrome (4346446434).

The spelling of 1312404303 in words is "one billion, three hundred twelve million, four hundred four thousand, three hundred three".