1297915800 has 48 divisors (see below), whose sum is σ = 4023540840. Its totient is φ = 346110720.

The previous prime is 1297915789. The next prime is 1297915811. The reversal of 1297915800 is 85197921.

It is an interprime number because it is at equal distance from previous prime (1297915789) and next prime (1297915811).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1080997 + ... + 1082196.

Almost surely, 2^1297915800 is an apocalyptic number.

1297915800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297915800 is an abundant number, since it is smaller than the sum of its proper divisors (2725625040).

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

1297915800 is a wasteful number, since it uses less digits than its factorization.

1297915800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163212 (or 2163203 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 1297915800 is about 36026.5985072141. The cubic root of 1297915800 is about 1090.8093195371.

The spelling of 1297915800 in words is "one billion, two hundred ninety-seven million, nine hundred fifteen thousand, eight hundred".