1299912980 has 48 divisors (see below), whose sum is σ = 2789231760. Its totient is φ = 508704768.

The previous prime is 1299912979. The next prime is 1299912997. The reversal of 1299912980 is 892199921.

It can be written as a sum of positive squares in 8 ways, for example, as 177528976 + 1122384004 = 13324^2 + 33502^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419276 + ... + 422364.

It is an arithmetic number, because the mean of its divisors is an integer number (58108995).

Almost surely, 2^1299912980 is an apocalyptic number.

1299912980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299912980 is an abundant number, since it is smaller than the sum of its proper divisors (1489318780).

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

1299912980 is a wasteful number, since it uses less digits than its factorization.

1299912980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548 (or 3546 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 1299912980 is about 36054.3059841678. The cubic root of 1299912980 is about 1091.3685304642.

The spelling of 1299912980 in words is "one billion, two hundred ninety-nine million, nine hundred twelve thousand, nine hundred eighty".