566261 has 4 divisors (see below), whose sum is σ = 574092. Its totient is φ = 558432.

The previous prime is 566233. The next prime is 566273. The reversal of 566261 is 162665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162665 = 5 ⋅32533.

It can be written as a sum of positive squares in 2 ways, for example, as 398161 + 168100 = 631^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 566261 - 2¹⁰ = 565237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 566261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3806 + ... + 3951.

It is an arithmetic number, because the mean of its divisors is an integer number (143523).

2⁵⁶⁶²⁶¹ is an apocalyptic number.

It is an amenable number.

566261 is a deficient number, since it is larger than the sum of its proper divisors (7831).

566261 is an equidigital number, since it uses as much as digits as its factorization.

566261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830.

The product of its digits is 2160, while the sum is 26.

The square root of 566261 is about 752.5031561396. The cubic root of 566261 is about 82.7317511929.

It can be divided in two parts, 5 and 66261, that added together give a palindrome (66266).

The spelling of 566261 in words is "five hundred sixty-six thousand, two hundred sixty-one".