1312957500 has 60 divisors (see below), whose sum is σ = 3828255816. Its totient is φ = 350120000.

The previous prime is 1312957483. The next prime is 1312957501. The reversal of 1312957500 is 57592131.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312957501) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80031 + ... + 95030.

Almost surely, 2^1312957500 is an apocalyptic number.

1312957500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312957500 is an abundant number, since it is smaller than the sum of its proper divisors (2515298316).

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

1312957500 is a wasteful number, since it uses less digits than its factorization.

1312957500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175088 (or 175071 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 1312957500 is about 36234.7554152088. The cubic root of 1312957500 is about 1095.0069847973.

The spelling of 1312957500 in words is "one billion, three hundred twelve million, nine hundred fifty-seven thousand, five hundred".