566321 has 8 divisors (see below), whose sum is σ = 685440. Its totient is φ = 456768.

The previous prime is 566311. The next prime is 566323. The reversal of 566321 is 123665.

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

It is a cyclic number.

It is not a de Polignac number, because 566321 - 2¹⁴ = 549937 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566323) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2261 + ... + 2498.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2⁵⁶⁶³²¹ is an apocalyptic number.

It is an amenable number.

566321 is a deficient number, since it is larger than the sum of its proper divisors (119119).

566321 is a wasteful number, since it uses less digits than its factorization.

566321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783.

The product of its digits is 1080, while the sum is 23.

The square root of 566321 is about 752.5430220260. The cubic root of 566321 is about 82.7346731257.

Adding to 566321 its reverse (123665), we get a palindrome (689986).

The spelling of 566321 in words is "five hundred sixty-six thousand, three hundred twenty-one".