1312511300 has 18 divisors (see below), whose sum is σ = 2848149738. Its totient is φ = 525004480.

The previous prime is 1312511297. The next prime is 1312511303. The reversal of 1312511300 is 31152131.

It is an interprime number because it is at equal distance from previous prime (1312511297) and next prime (1312511303).

It can be written as a sum of positive squares in 3 ways, for example, as 55383364 + 1257127936 = 7442^2 + 35456^2 .

It is not an unprimeable number, because it can be changed into a prime (1312511303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6562457 + ... + 6562656.

It is an arithmetic number, because the mean of its divisors is an integer number (158230541).

Almost surely, 2^1312511300 is an apocalyptic number.

1312511300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312511300 is an abundant number, since it is smaller than the sum of its proper divisors (1535638438).

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

1312511300 is a wasteful number, since it uses less digits than its factorization.

1312511300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13125127 (or 13125120 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1312511300 is about 36228.5978199543. The cubic root of 1312511300 is about 1094.8829270941.

Adding to 1312511300 its reverse (31152131), we get a palindrome (1343663431).

The spelling of 1312511300 in words is "one billion, three hundred twelve million, five hundred eleven thousand, three hundred".