561056 has 24 divisors (see below), whose sum is σ = 1122660. Its totient is φ = 275968.

The previous prime is 561053. The next prime is 561059. The reversal of 561056 is 650165.

It is an interprime number because it is at equal distance from previous prime (561053) and next prime (561059).

It can be written as a sum of positive squares in 2 ways, for example, as 547600 + 13456 = 740^2 + 116^2 .

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

It is not an unprimeable number, because it can be changed into a prime (561053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2750 + ... + 2946.

2⁵⁶¹⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

561056 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

561056 is a wasteful number, since it uses less digits than its factorization.

561056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 561056 is about 749.0367147210. The cubic root of 561056 is about 82.4774839075.

The spelling of 561056 in words is "five hundred sixty-one thousand, fifty-six".