1312140442 has 16 divisors (see below), whose sum is σ = 2015085600. Its totient is φ = 640462032.

The previous prime is 1312140433. The next prime is 1312140457. The reversal of 1312140442 is 2440412131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229288 + ... + 234940.

It is an arithmetic number, because the mean of its divisors is an integer number (125942850).

Almost surely, 2^1312140442 is an apocalyptic number.

1312140442 is a deficient number, since it is larger than the sum of its proper divisors (702945158).

1312140442 is a wasteful number, since it uses less digits than its factorization.

1312140442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8397.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1312140442 is about 36223.4791537202. The cubic root of 1312140442 is about 1094.7797954507.

Adding to 1312140442 its reverse (2440412131), we get a palindrome (3752552573).

The spelling of 1312140442 in words is "one billion, three hundred twelve million, one hundred forty thousand, four hundred forty-two".