1299642568 has 32 divisors (see below), whose sum is σ = 2787206400. Its totient is φ = 556538112.

The previous prime is 1299642563. The next prime is 1299642583. The reversal of 1299642568 is 8652469921.

It is not an unprimeable number, because it can be changed into a prime (1299642563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65568 + ... + 83056.

It is an arithmetic number, because the mean of its divisors is an integer number (87100200).

Almost surely, 2^1299642568 is an apocalyptic number.

It is an amenable number.

1299642568 is an abundant number, since it is smaller than the sum of its proper divisors (1487563832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1299642568 is a wasteful number, since it uses less digits than its factorization.

1299642568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18829 (or 18825 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The square root of 1299642568 is about 36050.5557238720. Note that the first 3 decimals coincide. The cubic root of 1299642568 is about 1091.2928485743.

The spelling of 1299642568 in words is "one billion, two hundred ninety-nine million, six hundred forty-two thousand, five hundred sixty-eight".