1280233881 has 6 divisors (see below), whose sum is σ = 1849226730. Its totient is φ = 853489248.

The previous prime is 1280233831. The next prime is 1280233957. The reversal of 1280233881 is 1883320821.

It can be written as a sum of positive squares in only one way, i.e., 642166281 + 638067600 = 25341^2 + 25260^2 .

It is not a de Polignac number, because 1280233881 - 2¹³ = 1280225689 is a prime.

It is a super-2 number, since 2×1280233881² = 3277997580120644322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1280233831) 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, 71124096 + ... + 71124113.

It is an arithmetic number, because the mean of its divisors is an integer number (308204455).

Almost surely, 2^1280233881 is an apocalyptic number.

It is an amenable number.

1280233881 is a deficient number, since it is larger than the sum of its proper divisors (568992849).

1280233881 is a wasteful number, since it uses less digits than its factorization.

1280233881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142248215 (or 142248212 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1280233881 is about 35780.3560770432. The cubic root of 1280233881 is about 1085.8331728925.

The spelling of 1280233881 in words is "one billion, two hundred eighty million, two hundred thirty-three thousand, eight hundred eighty-one".