1297318085 has 16 divisors (see below), whose sum is σ = 1782366336. Its totient is φ = 887995968.

The previous prime is 1297318069. The next prime is 1297318091. The reversal of 1297318085 is 5808137921.

It is a cyclic number.

It is not a de Polignac number, because 1297318085 - 2⁴ = 1297318069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13214 + ... + 52623.

It is an arithmetic number, because the mean of its divisors is an integer number (111397896).

Almost surely, 2^1297318085 is an apocalyptic number.

It is an amenable number.

1297318085 is a deficient number, since it is larger than the sum of its proper divisors (485048251).

1297318085 is an equidigital number, since it uses as much as digits as its factorization.

1297318085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66412.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 1297318085 is about 36018.3020838018. The cubic root of 1297318085 is about 1090.6418476556.

The spelling of 1297318085 in words is "one billion, two hundred ninety-seven million, three hundred eighteen thousand, eighty-five".