1312315403 has 6 divisors (see below), whose sum is σ = 1526571036. Its totient is φ = 1124841732.

The previous prime is 1312315363. The next prime is 1312315421. The reversal of 1312315403 is 3045132131.

It is not a de Polignac number, because 1312315403 - 2¹⁰ = 1312314379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312315903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13390925 + ... + 13391022.

It is an arithmetic number, because the mean of its divisors is an integer number (254428506).

Almost surely, 2^1312315403 is an apocalyptic number.

1312315403 is a deficient number, since it is larger than the sum of its proper divisors (214255633).

1312315403 is an equidigital number, since it uses as much as digits as its factorization.

1312315403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26781961 (or 26781954 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1312315403 is about 36225.8940952463. The cubic root of 1312315403 is about 1094.8284526546.

Adding to 1312315403 its reverse (3045132131), we get a palindrome (4357447534).

The spelling of 1312315403 in words is "one billion, three hundred twelve million, three hundred fifteen thousand, four hundred three".