1312342561 has 12 divisors (see below), whose sum is σ = 1360711872. Its totient is φ = 1265637000.

The previous prime is 1312342543. The next prime is 1312342567. The reversal of 1312342561 is 1652432131.

It is not a de Polignac number, because 1312342561 - 2⁹ = 1312342049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312342567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296676 + ... + 301066.

It is an arithmetic number, because the mean of its divisors is an integer number (113392656).

Almost surely, 2^1312342561 is an apocalyptic number.

It is an amenable number.

1312342561 is a deficient number, since it is larger than the sum of its proper divisors (48369311).

1312342561 is an equidigital number, since it uses as much as digits as its factorization.

1312342561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764 (or 4733 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 1312342561 is about 36226.2689356770. The cubic root of 1312342561 is about 1094.8360049920.

Adding to 1312342561 its reverse (1652432131), we get a palindrome (2964774692).

The spelling of 1312342561 in words is "one billion, three hundred twelve million, three hundred forty-two thousand, five hundred sixty-one".