118123 has 4 divisors (see below), whose sum is σ = 124360. Its totient is φ = 111888.

The previous prime is 118093. The next prime is 118127. The reversal of 118123 is 321811.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118097 and 118106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118127) 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, 3090 + ... + 3127.

It is an arithmetic number, because the mean of its divisors is an integer number (31090).

2¹¹⁸¹²³ is an apocalyptic number.

118123 is a deficient number, since it is larger than the sum of its proper divisors (6237).

118123 is an equidigital number, since it uses as much as digits as its factorization.

118123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236.

The product of its digits is 48, while the sum is 16.

The square root of 118123 is about 343.6902675375. The cubic root of 118123 is about 49.0657177356.

Adding to 118123 its reverse (321811), we get a palindrome (439934).

The spelling of 118123 in words is "one hundred eighteen thousand, one hundred twenty-three".