1297865280 has 224 divisors, whose sum is σ = 4308652800. Its totient is φ = 330670080.

The previous prime is 1297865267. The next prime is 1297865293. The reversal of 1297865280 is 825687921.

It is an interprime number because it is at equal distance from previous prime (1297865267) and next prime (1297865293).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2166421 + ... + 2167019.

Almost surely, 2^1297865280 is an apocalyptic number.

1297865280 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 1297865280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2154326400).

1297865280 is an abundant number, since it is smaller than the sum of its proper divisors (3010787520).

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

1297865280 is a wasteful number, since it uses less digits than its factorization.

1297865280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 1297865280 is about 36025.8973517663. The cubic root of 1297865280 is about 1090.7951664870.

The spelling of 1297865280 in words is "one billion, two hundred ninety-seven million, eight hundred sixty-five thousand, two hundred eighty".