1297384985 has 16 divisors (see below), whose sum is σ = 1701650496. Its totient is φ = 943766208.

The previous prime is 1297384967. The next prime is 1297384997. The reversal of 1297384985 is 5894837921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297384985 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1297384985.

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, 144599 + ... + 153308.

It is an arithmetic number, because the mean of its divisors is an integer number (106353156).

Almost surely, 2^1297384985 is an apocalyptic number.

It is an amenable number.

1297384985 is a deficient number, since it is larger than the sum of its proper divisors (404265511).

1297384985 is a wasteful number, since it uses less digits than its factorization.

1297384985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297992.

The product of its digits is 4354560, while the sum is 56.

The square root of 1297384985 is about 36019.2307663559. The cubic root of 1297384985 is about 1090.6605947119.

The spelling of 1297384985 in words is "one billion, two hundred ninety-seven million, three hundred eighty-four thousand, nine hundred eighty-five".