189045 has 12 divisors (see below), whose sum is σ = 327756. Its totient is φ = 100800.

The previous prime is 189043. The next prime is 189061. The reversal of 189045 is 540981.

189045 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 2 ways, for example, as 34596 + 154449 = 186^2 + 393^2 .

It is not a de Polignac number, because 189045 - 2¹ = 189043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2056 + ... + 2145.

It is an arithmetic number, because the mean of its divisors is an integer number (27313).

2¹⁸⁹⁰⁴⁵ is an apocalyptic number.

189045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189045 is a deficient number, since it is larger than the sum of its proper divisors (138711).

189045 is a wasteful number, since it uses less digits than its factorization.

189045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212 (or 4209 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 189045 is about 434.7930542224. The cubic root of 189045 is about 57.3924897198.

The spelling of 189045 in words is "one hundred eighty-nine thousand, forty-five".