111165 has 8 divisors (see below), whose sum is σ = 177888. Its totient is φ = 59280.

The previous prime is 111149. The next prime is 111187. The reversal of 111165 is 561111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111165 - 2⁴ = 111149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 7411 = 111165 / (1 + 1 + 1 + 1 + 6 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3691 + ... + 3720.

It is an arithmetic number, because the mean of its divisors is an integer number (22236).

2¹¹¹¹⁶⁵ is an apocalyptic number.

111165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111165 is a deficient number, since it is larger than the sum of its proper divisors (66723).

111165 is an equidigital number, since it uses as much as digits as its factorization.

111165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7419.

The product of its digits is 30, while the sum is 15.

The square root of 111165 is about 333.4141568680. The cubic root of 111165 is about 48.0827565434.

Adding to 111165 its reverse (561111), we get a palindrome (672276).

It can be divided in two parts, 1111 and 65, that added together give a triangular number (1176 = T₄₈).

The spelling of 111165 in words is "one hundred eleven thousand, one hundred sixty-five".