111365 has 4 divisors (see below), whose sum is σ = 133644. Its totient is φ = 89088.

The previous prime is 111347. The next prime is 111373. The reversal of 111365 is 563111.

111365 is nontrivially palindromic in base 12.

111365 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 563111 = 229 ⋅2459.

It can be written as a sum of positive squares in 2 ways, for example, as 12769 + 98596 = 113^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 111365 - 2⁶ = 111301 is a prime.

It is a Duffinian number.

111365 is an undulating number in base 12.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11132 + ... + 11141.

It is an arithmetic number, because the mean of its divisors is an integer number (33411).

2¹¹¹³⁶⁵ is an apocalyptic number.

It is an amenable number.

111365 is a deficient number, since it is larger than the sum of its proper divisors (22279).

111365 is an equidigital number, since it uses as much as digits as its factorization.

111365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22278.

The product of its digits is 90, while the sum is 17.

The square root of 111365 is about 333.7139493638. The cubic root of 111365 is about 48.1115749363. Note that the first 3 decimals are identical.

Adding to 111365 its reverse (563111), we get a palindrome (674476).

The spelling of 111365 in words is "one hundred eleven thousand, three hundred sixty-five".