1297435925 has 6 divisors (see below), whose sum is σ = 1608820578. Its totient is φ = 1037948720.

The previous prime is 1297435889. The next prime is 1297435927. The reversal of 1297435925 is 5295347921.

It can be written as a sum of positive squares in 3 ways, for example, as 277655569 + 1019780356 = 16663^2 + 31934^2 .

It is not a de Polignac number, because 1297435925 - 2³⁰ = 223694101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1297435925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297435927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25948694 + ... + 25948743.

It is an arithmetic number, because the mean of its divisors is an integer number (268136763).

Almost surely, 2^1297435925 is an apocalyptic number.

It is an amenable number.

1297435925 is a deficient number, since it is larger than the sum of its proper divisors (311384653).

1297435925 is an equidigital number, since it uses as much as digits as its factorization.

1297435925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51897447 (or 51897442 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The square root of 1297435925 is about 36019.9378816788. The cubic root of 1297435925 is about 1090.6748689441.

The spelling of 1297435925 in words is "one billion, two hundred ninety-seven million, four hundred thirty-five thousand, nine hundred twenty-five".