1297560000 has 280 divisors, whose sum is σ = 4684800384. Its totient is φ = 314240000.

The previous prime is 1297559983. The next prime is 1297560001. The reversal of 1297560000 is 657921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 1297560000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297560001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1319509 + ... + 1320491.

Almost surely, 2^1297560000 is an apocalyptic number.

1297560000 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 1297560000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2342400192).

1297560000 is an abundant number, since it is smaller than the sum of its proper divisors (3387240384).

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

1297560000 is an equidigital number, since it uses as much as digits as its factorization.

1297560000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1297560000 is about 36021.6601505261. The cubic root of 1297560000 is about 1090.7096352520.

The spelling of 1297560000 in words is "one billion, two hundred ninety-seven million, five hundred sixty thousand".