1563606 has 48 divisors (see below), whose sum is σ = 3790800. Its totient is φ = 461760.

The previous prime is 1563599. The next prime is 1563619. The reversal of 1563606 is 6063651.

1563606 is a `hidden beast` number, since 1 + 56 + 3 + 606 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1563606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10420 + ... + 10568.

It is an arithmetic number, because the mean of its divisors is an integer number (78975).

2^1563606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1563606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895400).

1563606 is an abundant number, since it is smaller than the sum of its proper divisors (2227194).

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

1563606 is a wasteful number, since it uses less digits than its factorization.

1563606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1563606 is about 1250.4423217406. The cubic root of 1563606 is about 116.0670935682.

The spelling of 1563606 in words is "one million, five hundred sixty-three thousand, six hundred six".