1313125812 has 36 divisors (see below), whose sum is σ = 3323232640. Its totient is φ = 437188752.

The previous prime is 1313125811. The next prime is 1313125813. The reversal of 1313125812 is 2185213131.

It is an interprime number because it is at equal distance from previous prime (1313125811) and next prime (1313125813).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313125811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9693 + ... + 52155.

Almost surely, 2^1313125812 is an apocalyptic number.

1313125812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1313125812 is an abundant number, since it is smaller than the sum of its proper divisors (2010106828).

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

1313125812 is a wasteful number, since it uses less digits than its factorization.

1313125812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43332 (or 43327 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 1313125812 is about 36237.0778623222. The cubic root of 1313125812 is about 1095.0537735524.

Adding to 1313125812 its reverse (2185213131), we get a palindrome (3498338943).

The spelling of 1313125812 in words is "one billion, three hundred thirteen million, one hundred twenty-five thousand, eight hundred twelve".