561589 has 12 divisors (see below), whose sum is σ = 666444. Its totient is φ = 471744.

The previous prime is 561559. The next prime is 561599. The reversal of 561589 is 985165.

It can be written as a sum of positive squares in 2 ways, for example, as 240100 + 321489 = 490^2 + 567^2 .

It is not a de Polignac number, because 561589 - 2⁷ = 561461 is a prime.

It is a Duffinian number.

561589 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3499 + ... + 3655.

It is an arithmetic number, because the mean of its divisors is an integer number (55537).

2⁵⁶¹⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

561589 is a deficient number, since it is larger than the sum of its proper divisors (104855).

561589 is a wasteful number, since it uses less digits than its factorization.

561589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 237 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 561589 is about 749.3924205648. The cubic root of 561589 is about 82.5035933544.

The spelling of 561589 in words is "five hundred sixty-one thousand, five hundred eighty-nine".