165785 has 8 divisors (see below), whose sum is σ = 202176. Its totient is φ = 130480.

The previous prime is 165779. The next prime is 165799. The reversal of 165785 is 587561.

165785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 165785 - 2⁶ = 165721 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

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, 122 + ... + 588.

It is an arithmetic number, because the mean of its divisors is an integer number (25272).

2¹⁶⁵⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

165785 is a deficient number, since it is larger than the sum of its proper divisors (36391).

165785 is an equidigital number, since it uses as much as digits as its factorization.

165785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543.

The product of its digits is 8400, while the sum is 32.

The square root of 165785 is about 407.1670418882. The cubic root of 165785 is about 54.9349092234.

The spelling of 165785 in words is "one hundred sixty-five thousand, seven hundred eighty-five".