2581056 has 42 divisors (see below), whose sum is σ = 7399782. Its totient is φ = 860160.

The previous prime is 2581049. The next prime is 2581069. The reversal of 2581056 is 6501852.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 147456 = 1560^2 + 384^2 .

It is an alternating number because its digits alternate between even and odd.

It is a zygodrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1665 + ... + 2816.

2^2581056 is an apocalyptic number.

It is an amenable number.

2581056 is an abundant number, since it is smaller than the sum of its proper divisors (4818726).

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

2581056 is a wasteful number, since it uses less digits than its factorization.

2581056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4499 (or 4486 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2581056 is about 1606.5665252332. The cubic root of 2581056 is about 137.1721068564.

The spelling of 2581056 in words is "two million, five hundred eighty-one thousand, fifty-six".