156189 has 8 divisors (see below), whose sum is σ = 227232. Its totient is φ = 94640.

The previous prime is 156157. The next prime is 156217. The reversal of 156189 is 981651.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 156189 - 2⁵ = 156157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156109) 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, 2334 + ... + 2399.

It is an arithmetic number, because the mean of its divisors is an integer number (28404).

2¹⁵⁶¹⁸⁹ is an apocalyptic number.

It is an amenable number.

156189 is a deficient number, since it is larger than the sum of its proper divisors (71043).

156189 is a wasteful number, since it uses less digits than its factorization.

156189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747.

The product of its digits is 2160, while the sum is 30.

The square root of 156189 is about 395.2075404139. The cubic root of 156189 is about 53.8538572443.

The spelling of 156189 in words is "one hundred fifty-six thousand, one hundred eighty-nine".