1297117312 has 16 divisors (see below), whose sum is σ = 2584101150. Its totient is φ = 648558592.

The previous prime is 1297117303. The next prime is 1297117313. The reversal of 1297117312 is 2137117921.

It can be written as a sum of positive squares in only one way, i.e., 1002102336 + 295014976 = 31656^2 + 17176^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (1297117313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5066737 + ... + 5066992.

Almost surely, 2^1297117312 is an apocalyptic number.

It is an amenable number.

1297117312 is a deficient number, since it is larger than the sum of its proper divisors (1286983838).

1297117312 is an equidigital number, since it uses as much as digits as its factorization.

1297117312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10133743 (or 10133731 counting only the distinct ones).

The product of its digits is 5292, while the sum is 34.

The square root of 1297117312 is about 36015.5148790074. The cubic root of 1297117312 is about 1090.5855821606.

The spelling of 1297117312 in words is "one billion, two hundred ninety-seven million, one hundred seventeen thousand, three hundred twelve".