561600 is a `hidden beast` number, since 5 + 61 + 600 = 666.
It is a congruent number.
2561600 is an apocalyptic number.
561600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 561600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1102360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
561600 is a wasteful number, since it uses less digits than its factorization.
561600 is an evil number, because the sum of its binary digits is even.
The square root of 561600 is about 749.3997598078. The cubic root of 561600 is about 82.5041320244.
Adding to 561600 its reverse (6165), we get a palindrome (567765).
The spelling of 561600 in words is "five hundred sixty-one thousand, six hundred".