1297945296 has 50 divisors (see below), whose sum is σ = 3756634002. Its totient is φ = 432648000.

The previous prime is 1297945247. The next prime is 1297945301. The reversal of 1297945296 is 6925497921.

1297945296 is a `hidden beast` number, since 1 + 29 + 7 + 94 + 529 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 884229696 + 413715600 = 29736^2 + 20340^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 499455 + ... + 502046.

Almost surely, 2^1297945296 is an apocalyptic number.

1297945296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1297945296 is an abundant number, since it is smaller than the sum of its proper divisors (2458688706).

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

1297945296 is a wasteful number, since it uses less digits than its factorization.

1297945296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001521 (or 1001506 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 1297945296 is about 36027.0078690973. The cubic root of 1297945296 is about 1090.8175825970.

The spelling of 1297945296 in words is "one billion, two hundred ninety-seven million, nine hundred forty-five thousand, two hundred ninety-six".