112165 has 4 divisors (see below), whose sum is σ = 134604. Its totient is φ = 89728.

The previous prime is 112163. The next prime is 112181. The reversal of 112165 is 561211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561211 = 7 ⋅80173.

It can be written as a sum of positive squares in 2 ways, for example, as 74529 + 37636 = 273^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 112165 - 2¹ = 112163 is a prime.

It is a Duffinian number.

112165 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112163) 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, 11212 + ... + 11221.

It is an arithmetic number, because the mean of its divisors is an integer number (33651).

2¹¹²¹⁶⁵ is an apocalyptic number.

It is an amenable number.

112165 is a deficient number, since it is larger than the sum of its proper divisors (22439).

112165 is an equidigital number, since it uses as much as digits as its factorization.

112165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22438.

The product of its digits is 60, while the sum is 16.

The square root of 112165 is about 334.9104357884. The cubic root of 112165 is about 48.2265047089.

Adding to 112165 its product of digits (60), we get a square (112225 = 335²).

Adding to 112165 its reverse (561211), we get a palindrome (673376).

The spelling of 112165 in words is "one hundred twelve thousand, one hundred sixty-five".