1312037136 has 80 divisors (see below), whose sum is σ = 3770790400. Its totient is φ = 436793472.

The previous prime is 1312037123. The next prime is 1312037137. The reversal of 1312037136 is 6317302131.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1312037137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481185 + ... + 483903.

It is an arithmetic number, because the mean of its divisors is an integer number (47134880).

Almost surely, 2^1312037136 is an apocalyptic number.

1312037136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312037136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1885395200).

1312037136 is an abundant number, since it is smaller than the sum of its proper divisors (2458753264).

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

1312037136 is a wasteful number, since it uses less digits than its factorization.

1312037136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853 (or 3841 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 1312037136 is about 36222.0531720663. The cubic root of 1312037136 is about 1094.7510636966.

Adding to 1312037136 its reverse (6317302131), we get a palindrome (7629339267).

The spelling of 1312037136 in words is "one billion, three hundred twelve million, thirty-seven thousand, one hundred thirty-six".