111189 has 8 divisors (see below), whose sum is σ = 159712. Its totient is φ = 68400.

The previous prime is 111187. The next prime is 111191. The reversal of 111189 is 981111.

It is an interprime number because it is at equal distance from previous prime (111187) and next prime (111191).

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

It is not a de Polignac number, because 111189 - 2¹ = 111187 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387 + ... + 1464.

It is an arithmetic number, because the mean of its divisors is an integer number (19964).

2¹¹¹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

111189 is a deficient number, since it is larger than the sum of its proper divisors (48523).

111189 is a wasteful number, since it uses less digits than its factorization.

111189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867.

The product of its digits is 72, while the sum is 21.

The square root of 111189 is about 333.4501461988. The cubic root of 111189 is about 48.0862165747.

It can be divided in two parts, 111 and 189, that added together give a triangular number (300 = T₂₄).

The spelling of 111189 in words is "one hundred eleven thousand, one hundred eighty-nine".