1312749700 has 18 divisors (see below), whose sum is σ = 2848667066. Its totient is φ = 525099840.

The previous prime is 1312749671. The next prime is 1312749703. The reversal of 1312749700 is 79472131.

It can be written as a sum of positive squares in 3 ways, for example, as 7661824 + 1305087876 = 2768^2 + 36126^2 .

It is not an unprimeable number, because it can be changed into a prime (1312749703) 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, 6563649 + ... + 6563848.

Almost surely, 2^1312749700 is an apocalyptic number.

1312749700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312749700 is an abundant number, since it is smaller than the sum of its proper divisors (1535917366).

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

1312749700 is a wasteful number, since it uses less digits than its factorization.

1312749700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13127511 (or 13127504 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1312749700 is about 36231.8878889853. The cubic root of 1312749700 is about 1094.9492133267.

The spelling of 1312749700 in words is "one billion, three hundred twelve million, seven hundred forty-nine thousand, seven hundred".