1280245841720 has 32 divisors (see below), whose sum is σ = 2881901278800. Its totient is φ = 511858668288.

The previous prime is 1280245841711. The next prime is 1280245841731. The reversal of 1280245841720 is 271485420821.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7403090 + ... + 7574049.

Almost surely, 2^{1280245841720} is an apocalyptic number.

1280245841720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280245841720 is an abundant number, since it is smaller than the sum of its proper divisors (1601655437080).

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

1280245841720 is a wasteful number, since it uses less digits than its factorization.

1280245841720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14979287 (or 14979283 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 44.

The spelling of 1280245841720 in words is "one trillion, two hundred eighty billion, two hundred forty-five million, eight hundred forty-one thousand, seven hundred twenty".