1299786966724 has 9 divisors (see below), whose sum is σ = 2274631182061. Its totient is φ = 649892343280.

The previous prime is 1299786966719. The next prime is 1299786966727. The reversal of 1299786966724 is 4276696879921.

The square root of 1299786966724 is 1140082.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1299641040324 + 145926400 = 1140018^2 + 12080^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299786966727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1995144 + ... + 2565184.

Almost surely, 2^{1299786966724} is an apocalyptic number.

1299786966724 is the 1140082-nd square number.

It is an amenable number.

1299786966724 is a deficient number, since it is larger than the sum of its proper divisors (974844215337).

1299786966724 is an frugal number, since it uses more digits than its factorization.

1299786966724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140086 (or 570043 counting only the distinct ones).

The product of its digits is 987614208, while the sum is 76.

The spelling of 1299786966724 in words is "one trillion, two hundred ninety-nine billion, seven hundred eighty-six million, nine hundred sixty-six thousand, seven hundred twenty-four".