118165 has 4 divisors (see below), whose sum is σ = 141804. Its totient is φ = 94528.

The previous prime is 118163. The next prime is 118169. The reversal of 118165 is 561811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561811 = 19 ⋅29569.

It can be written as a sum of positive squares in 2 ways, for example, as 78961 + 39204 = 281^2 + 198^2 .

It is a cyclic number.

It is not a de Polignac number, because 118165 - 2¹ = 118163 is a prime.

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 Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11812 + ... + 11821.

It is an arithmetic number, because the mean of its divisors is an integer number (35451).

2¹¹⁸¹⁶⁵ is an apocalyptic number.

It is an amenable number.

118165 is a deficient number, since it is larger than the sum of its proper divisors (23639).

118165 is an equidigital number, since it uses as much as digits as its factorization.

118165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23638.

The product of its digits is 240, while the sum is 22.

The square root of 118165 is about 343.7513636337. The cubic root of 118165 is about 49.0715323411.

Adding to 118165 its reverse (561811), we get a palindrome (679976).

The spelling of 118165 in words is "one hundred eighteen thousand, one hundred sixty-five".