1280389212751 has 6 divisors (see below), whose sum is σ = 1407369961256. Its totient is φ = 1163990193300.

The previous prime is 1280389212743. The next prime is 1280389212763. The reversal of 1280389212751 is 1572129830821.

It is not a de Polignac number, because 1280389212751 - 2³ = 1280389212743 is a prime.

It is a super-2 number, since 2×1280389212751² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1280389212695 and 1280389212704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280389212701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5290864395 + ... + 5290864636.

Almost surely, 2^{1280389212751} is an apocalyptic number.

1280389212751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1280389212751 is a deficient number, since it is larger than the sum of its proper divisors (126980748505).

1280389212751 is a wasteful number, since it uses less digits than its factorization.

1280389212751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10581729053 (or 10581729042 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 1280389212751 in words is "one trillion, two hundred eighty billion, three hundred eighty-nine million, two hundred twelve thousand, seven hundred fifty-one".