1280122056 has 96 divisors (see below), whose sum is σ = 3656671200. Its totient is φ = 419437440.

The previous prime is 1280122043. The next prime is 1280122061. The reversal of 1280122056 is 6502210821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 23 ways as a sum of consecutive naturals, for example, 109116 + ... + 120276.

It is an arithmetic number, because the mean of its divisors is an integer number (38090325).

Almost surely, 2^1280122056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280122056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828335600).

1280122056 is an abundant number, since it is smaller than the sum of its proper divisors (2376549144).

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

1280122056 is a wasteful number, since it uses less digits than its factorization.

1280122056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11241 (or 11225 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1280122056 is about 35778.7933837909. The cubic root of 1280122056 is about 1085.8015570990.

Adding to 1280122056 its reverse (6502210821), we get a palindrome (7782332877).

The spelling of 1280122056 in words is "one billion, two hundred eighty million, one hundred twenty-two thousand, fifty-six".