1081085256 has 72 divisors (see below), whose sum is σ = 3090226230. Its totient is φ = 341387136.

The previous prime is 1081085197. The next prime is 1081085281. The reversal of 1081085256 is 6525801801.

It can be written as a sum of positive squares in only one way, i.e., 1026177156 + 54908100 = 32034^2 + 7410^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1081085256.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5196 + ... + 46788.

Almost surely, 2^1081085256 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 1081085256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1545113115).

1081085256 is an abundant number, since it is smaller than the sum of its proper divisors (2009140974).

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

1081085256 is a wasteful number, since it uses less digits than its factorization.

1081085256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41643 (or 41617 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 1081085256 is about 32879.8609486111. The cubic root of 1081085256 is about 1026.3291125255.

The spelling of 1081085256 in words is "one billion, eighty-one million, eighty-five thousand, two hundred fifty-six".