1312140242 has 16 divisors (see below), whose sum is σ = 2265805440. Its totient is φ = 558240288.

The previous prime is 1312140211. The next prime is 1312140259. The reversal of 1312140242 is 2420412131.

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, 340142 + ... + 343977.

It is an arithmetic number, because the mean of its divisors is an integer number (141612840).

Almost surely, 2^1312140242 is an apocalyptic number.

1312140242 is a deficient number, since it is larger than the sum of its proper divisors (953665198).

1312140242 is a wasteful number, since it uses less digits than its factorization.

1312140242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684265.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1312140242 is about 36223.4763930797. The cubic root of 1312140242 is about 1094.7797398276.

Adding to 1312140242 its reverse (2420412131), we get a palindrome (3732552373).

The spelling of 1312140242 in words is "one billion, three hundred twelve million, one hundred forty thousand, two hundred forty-two".