123166 has 4 divisors (see below), whose sum is σ = 184752. Its totient is φ = 61582.

The previous prime is 123143. The next prime is 123169. The reversal of 123166 is 661321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30790 + ... + 30793.

It is an arithmetic number, because the mean of its divisors is an integer number (46188).

2¹²³¹⁶⁶ is an apocalyptic number.

123166 is a deficient number, since it is larger than the sum of its proper divisors (61586).

123166 is an equidigital number, since it uses as much as digits as its factorization.

123166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61585.

The product of its digits is 216, while the sum is 19.

The square root of 123166 is about 350.9501389086. The cubic root of 123166 is about 49.7542608911.

Adding to 123166 its reverse (661321), we get a palindrome (784487).

It can be divided in two parts, 123 and 166, that added together give a square (289 = 17²).

The spelling of 123166 in words is "one hundred twenty-three thousand, one hundred sixty-six".