1297505168 has 10 divisors (see below), whose sum is σ = 2513916294. Its totient is φ = 648752576.

The previous prime is 1297505081. The next prime is 1297505189. The reversal of 1297505168 is 8615057921.

It can be written as a sum of positive squares in only one way, i.e., 657819904 + 639685264 = 25648^2 + 25292^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40547021 + ... + 40547052.

Almost surely, 2^1297505168 is an apocalyptic number.

It is an amenable number.

1297505168 is a deficient number, since it is larger than the sum of its proper divisors (1216411126).

1297505168 is an equidigital number, since it uses as much as digits as its factorization.

1297505168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81094081 (or 81094075 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 44.

The square root of 1297505168 is about 36020.8990448601. The cubic root of 1297505168 is about 1090.6942713811.

The spelling of 1297505168 in words is "one billion, two hundred ninety-seven million, five hundred five thousand, one hundred sixty-eight".