1280998403343 has 160 divisors (see below), whose sum is σ = 2081261952000. Its totient is φ = 782736514560.

The previous prime is 1280998403303. The next prime is 1280998403389. The reversal of 1280998403343 is 3433048990821.

It is a Cunningham number, because it is equal to 1131812²-1.

It is not a de Polignac number, because 1280998403343 - 2¹⁷ = 1280998272271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1280998403343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280998403303) 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 159 ways as a sum of consecutive naturals, for example, 1526815318 + ... + 1526816156.

It is an arithmetic number, because the mean of its divisors is an integer number (13007887200).

Almost surely, 2^{1280998403343} is an apocalyptic number.

1280998403343 is a deficient number, since it is larger than the sum of its proper divisors (800263548657).

1280998403343 is a wasteful number, since it uses less digits than its factorization.

1280998403343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 1280998403343 in words is "one trillion, two hundred eighty billion, nine hundred ninety-eight million, four hundred three thousand, three hundred forty-three".