1298306985 has 8 divisors (see below), whose sum is σ = 2077291200. Its totient is φ = 692430384.

The previous prime is 1298306969. The next prime is 1298307011. The reversal of 1298306985 is 5896038921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1298306985 - 2⁴ = 1298306969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43276885 + ... + 43276914.

It is an arithmetic number, because the mean of its divisors is an integer number (259661400).

Almost surely, 2^1298306985 is an apocalyptic number.

1298306985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1298306985 is a deficient number, since it is larger than the sum of its proper divisors (778984215).

1298306985 is an equidigital number, since it uses as much as digits as its factorization.

1298306985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86553807.

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 1298306985 is about 36032.0272119125. The cubic root of 1298306985 is about 1090.9188965943.

The spelling of 1298306985 in words is "one billion, two hundred ninety-eight million, three hundred six thousand, nine hundred eighty-five".