1297025730 has 256 divisors, whose sum is σ = 4644864000. Its totient is φ = 248728320.

The previous prime is 1297025701. The next prime is 1297025759. The reversal of 1297025730 is 375207921.

1297025730 is a `hidden beast` number, since 12 + 9 + 70 + 2 + 573 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1297025701) and next prime (1297025759).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 267871 + ... + 272669.

It is an arithmetic number, because the mean of its divisors is an integer number (18144000).

Almost surely, 2^1297025730 is an apocalyptic number.

1297025730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297025730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2322432000).

1297025730 is an abundant number, since it is smaller than the sum of its proper divisors (3347838270).

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

1297025730 is a wasteful number, since it uses less digits than its factorization.

1297025730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846 (or 4840 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 1297025730 is about 36014.2434322866. The cubic root of 1297025730 is about 1090.5599148961.

The spelling of 1297025730 in words is "one billion, two hundred ninety-seven million, twenty-five thousand, seven hundred thirty".