165187 has 4 divisors (see below), whose sum is σ = 180216. Its totient is φ = 150160.

The previous prime is 165181. The next prime is 165203. The reversal of 165187 is 781561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165187 - 2⁷ = 165059 is a prime.

It is a Duffinian number.

165187 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (165181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7498 + ... + 7519.

It is an arithmetic number, because the mean of its divisors is an integer number (45054).

2¹⁶⁵¹⁸⁷ is an apocalyptic number.

165187 is a deficient number, since it is larger than the sum of its proper divisors (15029).

165187 is a wasteful number, since it uses less digits than its factorization.

165187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15028.

The product of its digits is 1680, while the sum is 28.

The square root of 165187 is about 406.4320361389. The cubic root of 165187 is about 54.8687780819.

The spelling of 165187 in words is "one hundred sixty-five thousand, one hundred eighty-seven".