162189 has 8 divisors (see below), whose sum is σ = 240320. Its totient is φ = 108108.

The previous prime is 162143. The next prime is 162209. The reversal of 162189 is 981261.

It is not a de Polignac number, because 162189 - 2¹¹ = 160141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 6007 = 162189 / (1 + 6 + 2 + 1 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162109) 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, 2977 + ... + 3030.

It is an arithmetic number, because the mean of its divisors is an integer number (30040).

2¹⁶²¹⁸⁹ is an apocalyptic number.

It is an amenable number.

162189 is a deficient number, since it is larger than the sum of its proper divisors (78131).

162189 is an equidigital number, since it uses as much as digits as its factorization.

162189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6016 (or 6010 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 162189 is about 402.7269546479. The cubic root of 162189 is about 54.5348092862.

It can be divided in two parts, 162 and 189, that added together give a triangular number (351 = T₂₆).

The spelling of 162189 in words is "one hundred sixty-two thousand, one hundred eighty-nine".