1563601 has 4 divisors (see below), whose sum is σ = 1683892. Its totient is φ = 1443312.

The previous prime is 1563599. The next prime is 1563619. The reversal of 1563601 is 1063651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180625 + 1382976 = 425^2 + 1176^2 .

It is not a de Polignac number, because 1563601 - 2¹ = 1563599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1563631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60126 + ... + 60151.

It is an arithmetic number, because the mean of its divisors is an integer number (420973).

2^1563601 is an apocalyptic number.

It is an amenable number.

1563601 is a deficient number, since it is larger than the sum of its proper divisors (120291).

1563601 is a wasteful number, since it uses less digits than its factorization.

1563601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120290.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1563601 is about 1250.4403224465. The cubic root of 1563601 is about 116.0669698507.

The spelling of 1563601 in words is "one million, five hundred sixty-three thousand, six hundred one".