1297296660 has 72 divisors (see below), whose sum is σ = 3992694048. Its totient is φ = 314494400.

The previous prime is 1297296653. The next prime is 1297296727. The reversal of 1297296660 is 666927921.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82086 + ... + 96605.

It is an arithmetic number, because the mean of its divisors is an integer number (55454084).

Almost surely, 2^1297296660 is an apocalyptic number.

1297296660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297296660 is an abundant number, since it is smaller than the sum of its proper divisors (2695397388).

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

1297296660 is a wasteful number, since it uses less digits than its factorization.

1297296660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178725 (or 178712 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 1297296660 is about 36018.0046643342. The cubic root of 1297296660 is about 1090.6358436975.

The spelling of 1297296660 in words is "one billion, two hundred ninety-seven million, two hundred ninety-six thousand, six hundred sixty".