1312431402005 has 8 divisors (see below), whose sum is σ = 1580772396600. Its totient is φ = 1046041978816.

The previous prime is 1312431401969. The next prime is 1312431402019. The reversal of 1312431402005 is 5002041342131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48080356 + 1312383321649 = 6934^2 + 1145593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312431402005 - 2³⁴ = 1295251532821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487891370 + ... + 487894059.

It is an arithmetic number, because the mean of its divisors is an integer number (197596549575).

Almost surely, 2^{1312431402005} is an apocalyptic number.

It is an amenable number.

1312431402005 is a deficient number, since it is larger than the sum of its proper divisors (268340994595).

1312431402005 is an equidigital number, since it uses as much as digits as its factorization.

1312431402005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975785703.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1312431402005 its reverse (5002041342131), we get a palindrome (6314472744136).

The spelling of 1312431402005 in words is "one trillion, three hundred twelve billion, four hundred thirty-one million, four hundred two thousand, five".