1297057616 has 20 divisors (see below), whose sum is σ = 2538959892. Its totient is φ = 641842176.

The previous prime is 1297057589. The next prime is 1297057627. The reversal of 1297057616 is 6167507921.

It can be written as a sum of positive squares in 2 ways, for example, as 541027600 + 756030016 = 23260^2 + 27496^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416315 + ... + 419418.

Almost surely, 2^1297057616 is an apocalyptic number.

1297057616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1297057616 is a deficient number, since it is larger than the sum of its proper divisors (1241902276).

1297057616 is an equidigital number, since it uses as much as digits as its factorization.

1297057616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835838 (or 835832 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 1297057616 is about 36014.6861155279. The cubic root of 1297057616 is about 1090.5688515753.

The spelling of 1297057616 in words is "one billion, two hundred ninety-seven million, fifty-seven thousand, six hundred sixteen".