It is a nialpdrome in base 5 and base 7.
It is a zygodrome in base 5.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 15606.
15606 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
215606 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 15606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18420).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
15606 is a wasteful number, since it uses less digits than its factorization.
15606 is an evil number, because the sum of its binary digits is even.
The square root of 15606 is about 124.9239768819. The cubic root of 15606 is about 24.9898625565.
The spelling of 15606 in words is "fifteen thousand, six hundred six".