1312534642 has 4 divisors (see below), whose sum is σ = 1968801966. Its totient is φ = 656267320.

The previous prime is 1312534627. The next prime is 1312534661. The reversal of 1312534642 is 2464352131.

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

It can be written as a sum of positive squares in only one way, i.e., 1211109601 + 101425041 = 34801^2 + 10071^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328133659 + ... + 328133662.

Almost surely, 2^1312534642 is an apocalyptic number.

1312534642 is a deficient number, since it is larger than the sum of its proper divisors (656267324).

1312534642 is an equidigital number, since it uses as much as digits as its factorization.

1312534642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656267323.

The product of its digits is 17280, while the sum is 31.

The square root of 1312534642 is about 36228.9199673410. The cubic root of 1312534642 is about 1094.8894176048.

Adding to 1312534642 its reverse (2464352131), we get a palindrome (3776886773).

The spelling of 1312534642 in words is "one billion, three hundred twelve million, five hundred thirty-four thousand, six hundred forty-two".