1312135040 has 32 divisors (see below), whose sum is σ = 3136824360. Its totient is φ = 524853760.

The previous prime is 1312135039. The next prime is 1312135051. The reversal of 1312135040 is 405312131.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1024466 + ... + 1025745.

Almost surely, 2^1312135040 is an apocalyptic number.

1312135040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312135040 is an abundant number, since it is smaller than the sum of its proper divisors (1824689320).

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

1312135040 is an equidigital number, since it uses as much as digits as its factorization.

1312135040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050230 (or 2050218 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1312135040 is about 36223.4045887462. The cubic root of 1312135040 is about 1094.7782930687.

Adding to 1312135040 its reverse (405312131), we get a palindrome (1717447171).

The spelling of 1312135040 in words is "one billion, three hundred twelve million, one hundred thirty-five thousand, forty".