1297253925 has 72 divisors (see below), whose sum is σ = 2547024480. Its totient is φ = 625929600.

The previous prime is 1297253921. The next prime is 1297253963. The reversal of 1297253925 is 5293527921.

1297253925 is a `hidden beast` number, since 1 + 2 + 97 + 2 + 539 + 25 = 666.

It is not a de Polignac number, because 1297253925 - 2² = 1297253921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297253921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 560671 + ... + 562979.

It is an arithmetic number, because the mean of its divisors is an integer number (35375340).

Almost surely, 2^1297253925 is an apocalyptic number.

1297253925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1297253925 is a deficient number, since it is larger than the sum of its proper divisors (1249770555).

1297253925 is a wasteful number, since it uses less digits than its factorization.

1297253925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563 (or 2555 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 1297253925 is about 36017.4114144812. The cubic root of 1297253925 is about 1090.6238678105.

The spelling of 1297253925 in words is "one billion, two hundred ninety-seven million, two hundred fifty-three thousand, nine hundred twenty-five".