15606 has 24 divisors (see below), whose sum is σ = 36840. Its totient is φ = 4896.

The previous prime is 15601. The next prime is 15607. The reversal of 15606 is 60651.

It is a Harshad number since it is a multiple of its sum of digits (18).

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.

It is not an unprimeable number, because it can be changed into a prime (15601) by changing a digit.

15606 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 11 ways as a sum of consecutive naturals, for example, 910 + ... + 926.

It is an arithmetic number, because the mean of its divisors is an integer number (1535).

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).

15606 is an abundant number, since it is smaller than the sum of its proper divisors (21234).

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 sum of its prime factors is 45 (or 22 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

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".