561596 has 24 divisors (see below), whose sum is σ = 1161216. Its totient is φ = 232560.

The previous prime is 561559. The next prime is 561599. The reversal of 561596 is 695165.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561599) by changing a digit.

561596 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (48384).

2⁵⁶¹⁵⁹⁶ 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 561596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580608).

561596 is an abundant number, since it is smaller than the sum of its proper divisors (599620).

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

561596 is a wasteful number, since it uses less digits than its factorization.

561596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 687 counting only the distinct ones).

The product of its digits is 8100, while the sum is 32.

The square root of 561596 is about 749.3970910005. The cubic root of 561596 is about 82.5039361452.

It can be divided in two parts, 56159 and 6, that added together give a palindrome (56165).

The spelling of 561596 in words is "five hundred sixty-one thousand, five hundred ninety-six".