581560 has 64 divisors (see below), whose sum is σ = 1566720. Its totient is φ = 190080.

The previous prime is 581557. The next prime is 581573. The reversal of 581560 is 65185.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8647 + ... + 8713.

It is an arithmetic number, because the mean of its divisors is an integer number (24480).

2⁵⁸¹⁵⁶⁰ 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 581560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783360).

581560 is an abundant number, since it is smaller than the sum of its proper divisors (985160).

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

581560 is a wasteful number, since it uses less digits than its factorization.

581560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 581560 is about 762.6008130077. The cubic root of 581560 is about 83.4702106078.

The spelling of 581560 in words is "five hundred eighty-one thousand, five hundred sixty".