165804 has 24 divisors (see below), whose sum is σ = 397488. Its totient is φ = 53760.

The previous prime is 165799. The next prime is 165811. The reversal of 165804 is 408561.

165804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 165804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324 + ... + 660.

It is an arithmetic number, because the mean of its divisors is an integer number (16562).

2¹⁶⁵⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

165804 is an abundant number, since it is smaller than the sum of its proper divisors (231684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165804 is a wasteful number, since it uses less digits than its factorization.

165804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 165804 is about 407.1903731671. The cubic root of 165804 is about 54.9370077715.

It can be divided in two parts, 165 and 804, that added together give a palindrome (969).

The spelling of 165804 in words is "one hundred sixty-five thousand, eight hundred four".