1312310143 has 4 divisors (see below), whose sum is σ = 1312485840. Its totient is φ = 1312134448.

The previous prime is 1312310137. The next prime is 1312310147. The reversal of 1312310143 is 3410132131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1312310143 - 2²¹ = 1310212991 is a prime.

It is a super-2 number, since 2×1312310143² = 3444315822841360898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312310143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312310147) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 76123 + ... + 91756.

It is an arithmetic number, because the mean of its divisors is an integer number (328121460).

Almost surely, 2^1312310143 is an apocalyptic number.

1312310143 is a deficient number, since it is larger than the sum of its proper divisors (175697).

1312310143 is an equidigital number, since it uses as much as digits as its factorization.

1312310143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175696.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1312310143 is about 36225.8214951711. The cubic root of 1312310143 is about 1094.8269898951.

Adding to 1312310143 its reverse (3410132131), we get a palindrome (4722442274).

The spelling of 1312310143 in words is "one billion, three hundred twelve million, three hundred ten thousand, one hundred forty-three".