1297512900 has 54 divisors (see below), whose sum is σ = 4066984922. Its totient is φ = 346003200.

The previous prime is 1297512857. The next prime is 1297512941. The reversal of 1297512900 is 92157921.

It can be written as a sum of positive squares in 3 ways, for example, as 425019456 + 872493444 = 20616^2 + 29538^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 719941 + ... + 721740.

Almost surely, 2^1297512900 is an apocalyptic number.

1297512900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297512900 is an abundant number, since it is smaller than the sum of its proper divisors (2769472022).

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

1297512900 is a wasteful number, since it uses less digits than its factorization.

1297512900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441701 (or 1441691 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 1297512900 is about 36021.0063712829. The cubic root of 1297512900 is about 1090.6964379059.

It can be divided in two parts, 129751 and 2900, that added together give a cube (132651 = 51³).

The spelling of 1297512900 in words is "one billion, two hundred ninety-seven million, five hundred twelve thousand, nine hundred".