1299865428000 has 192 divisors, whose sum is σ = 4731510551040. Its totient is φ = 346630752000.

The previous prime is 1299865427977. The next prime is 1299865428011. The reversal of 1299865428000 is 8245689921.

It is a happy number.

1299865428000 is a `hidden beast` number, since 1 + 2 + 9 + 98 + 6 + 542 + 8 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 31 ways as a sum of consecutive naturals, for example, 5909896 + ... + 6125895.

It is an arithmetic number, because the mean of its divisors is an integer number (24643284120).

Almost surely, 2^{1299865428000} is an apocalyptic number.

1299865428000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299865428000 is an abundant number, since it is smaller than the sum of its proper divisors (3431645123040).

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

1299865428000 is a wasteful number, since it uses less digits than its factorization.

1299865428000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12035825 (or 12035801 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 1299865428000 in words is "one trillion, two hundred ninety-nine billion, eight hundred sixty-five million, four hundred twenty-eight thousand".