563842 has 4 divisors (see below), whose sum is σ = 845766. Its totient is φ = 281920.

The previous prime is 563837. The next prime is 563851. The reversal of 563842 is 248365.

563842 is nontrivially palindromic in base 9.

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

It can be written as a sum of positive squares in only one way, i.e., 447561 + 116281 = 669^2 + 341^2 .

It is a d-powerful number, because it can be written as 5³ + 6² + 8⁵ + 3⁸ + 4³ + 2¹⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 563842.

It is an unprimeable number.

563842 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140959 + ... + 140962.

2⁵⁶³⁸⁴² is an apocalyptic number.

563842 is a deficient number, since it is larger than the sum of its proper divisors (281924).

563842 is a wasteful number, since it uses less digits than its factorization.

563842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281923.

The product of its digits is 5760, while the sum is 28.

The square root of 563842 is about 750.8941336833. The cubic root of 563842 is about 82.6137762904.

The spelling of 563842 in words is "five hundred sixty-three thousand, eight hundred forty-two".