122566 has 4 divisors (see below), whose sum is σ = 183852. Its totient is φ = 61282.

The previous prime is 122561. The next prime is 122579. The reversal of 122566 is 665221.

122566 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122561) 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 as a sum of consecutive naturals, namely, 30640 + ... + 30643.

It is an arithmetic number, because the mean of its divisors is an integer number (45963).

2¹²²⁵⁶⁶ is an apocalyptic number.

122566 is a deficient number, since it is larger than the sum of its proper divisors (61286).

122566 is an equidigital number, since it uses as much as digits as its factorization.

122566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61285.

The product of its digits is 720, while the sum is 22.

The square root of 122566 is about 350.0942730180. The cubic root of 122566 is about 49.6733371419.

Adding to 122566 its reverse (665221), we get a palindrome (787787).

It can be divided in two parts, 12256 and 6, that multiplied together give a triangular number (73536 = T₃₈₃).

The spelling of 122566 in words is "one hundred twenty-two thousand, five hundred sixty-six".