120189 has 4 divisors (see below), whose sum is σ = 160256. Its totient is φ = 80124.

The previous prime is 120181. The next prime is 120193. The reversal of 120189 is 981021.

120189 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 981021 = 3 ⋅327007.

It is not a de Polignac number, because 120189 - 2³ = 120181 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

120189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120181) 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, 20029 + ... + 20034.

It is an arithmetic number, because the mean of its divisors is an integer number (40064).

2¹²⁰¹⁸⁹ is an apocalyptic number.

It is an amenable number.

120189 is a deficient number, since it is larger than the sum of its proper divisors (40067).

120189 is an equidigital number, since it uses as much as digits as its factorization.

120189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40066.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 120189 is about 346.6828521863. The cubic root of 120189 is about 49.3501231303.

The spelling of 120189 in words is "one hundred twenty thousand, one hundred eighty-nine".