1280242421712 has 60 divisors (see below), whose sum is σ = 3601088059140. Its totient is φ = 424581233664.

The previous prime is 1280242421677. The next prime is 1280242421737. The reversal of 1280242421712 is 2171242420821.

1280242421712 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 2 + 424 + 217 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1148403716496 + 131838705216 = 1071636^2 + 363096^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 22536537 + ... + 22593272.

It is an arithmetic number, because the mean of its divisors is an integer number (60018134319).

Almost surely, 2^{1280242421712} is an apocalyptic number.

1280242421712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1280242421712 is an abundant number, since it is smaller than the sum of its proper divisors (2320845637428).

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

1280242421712 is a wasteful number, since it uses less digits than its factorization.

1280242421712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45130020 (or 45130011 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The spelling of 1280242421712 in words is "one trillion, two hundred eighty billion, two hundred forty-two million, four hundred twenty-one thousand, seven hundred twelve".