1312042040 has 16 divisors (see below), whose sum is σ = 2952094680. Its totient is φ = 524816800.

The previous prime is 1312042027. The next prime is 1312042063. The reversal of 1312042040 is 402402131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16400486 + ... + 16400565.

Almost surely, 2^1312042040 is an apocalyptic number.

1312042040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312042040 is an abundant number, since it is smaller than the sum of its proper divisors (1640052640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312042040 is a wasteful number, since it uses less digits than its factorization.

1312042040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32801062 (or 32801058 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1312042040 is about 36222.1208655705. The cubic root of 1312042040 is about 1094.7524276449.

Adding to 1312042040 its reverse (402402131), we get a palindrome (1714444171).

The spelling of 1312042040 in words is "one billion, three hundred twelve million, forty-two thousand, forty".