165065 has 4 divisors (see below), whose sum is σ = 198084. Its totient is φ = 132048.

The previous prime is 165059. The next prime is 165079. The reversal of 165065 is 560561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43264 + 121801 = 208^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 165065 - 2⁴ = 165049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165065.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 165065.

It is an unprimeable number.

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, 16502 + ... + 16511.

It is an arithmetic number, because the mean of its divisors is an integer number (49521).

2¹⁶⁵⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

165065 is a deficient number, since it is larger than the sum of its proper divisors (33019).

165065 is an equidigital number, since it uses as much as digits as its factorization.

165065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33018.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 165065 is about 406.2819218228. The cubic root of 165065 is about 54.8552668500.

The spelling of 165065 in words is "one hundred sixty-five thousand, sixty-five".