1312500000 has 240 divisors, whose sum is σ = 4921874496. Its totient is φ = 300000000.

The previous prime is 1312499987. The next prime is 1312500047. The reversal of 1312500000 is 52131.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 39 ways as a sum of consecutive naturals, for example, 187499997 + ... + 187500003.

Almost surely, 2^1312500000 is an apocalyptic number.

1312500000 is a gapful number since it is divisible by the number (10) 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 1312500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2460937248).

1312500000 is an abundant number, since it is smaller than the sum of its proper divisors (3609374496).

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

1312500000 is an frugal number, since it uses more digits than its factorization.

1312500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 1312500000 is about 36228.4418654736. The cubic root of 1312500000 is about 1094.8797849720.

Adding to 1312500000 its reverse (52131), we get a palindrome (1312552131).

The spelling of 1312500000 in words is "one billion, three hundred twelve million, five hundred thousand".