563421 has 8 divisors (see below), whose sum is σ = 758560. Its totient is φ = 371952.

The previous prime is 563419. The next prime is 563447. The reversal of 563421 is 124365.

It is a happy number.

563421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 563421 - 2¹ = 563419 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (94820).

2⁵⁶³⁴²¹ is an apocalyptic number.

It is an amenable number.

563421 is a deficient number, since it is larger than the sum of its proper divisors (195139).

563421 is a wasteful number, since it uses less digits than its factorization.

563421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835.

The product of its digits is 720, while the sum is 21.

The square root of 563421 is about 750.6137488749. The cubic root of 563421 is about 82.5932096187.

Adding to 563421 its reverse (124365), we get a palindrome (687786).

The spelling of 563421 in words is "five hundred sixty-three thousand, four hundred twenty-one".