1255485881 has 16 divisors (see below), whose sum is σ = 1363111680. Its totient is φ = 1149482880.

The previous prime is 1255485877. The next prime is 1255485899. The reversal of 1255485881 is 1885845521.

It is not a de Polignac number, because 1255485881 - 2² = 1255485877 is a prime.

It is a super-2 number, since 2×1255485881² = 3152489594780692322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255485851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 971846 + ... + 973136.

It is an arithmetic number, because the mean of its divisors is an integer number (85194480).

Almost surely, 2^1255485881 is an apocalyptic number.

It is an amenable number.

1255485881 is a deficient number, since it is larger than the sum of its proper divisors (107625799).

1255485881 is a wasteful number, since it uses less digits than its factorization.

1255485881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856.

The product of its digits is 512000, while the sum is 47.

The square root of 1255485881 is about 35432.8361975160. The cubic root of 1255485881 is about 1078.7909082654.

The spelling of 1255485881 in words is "one billion, two hundred fifty-five million, four hundred eighty-five thousand, eight hundred eighty-one".