165894 has 16 divisors (see below), whose sum is σ = 340032. Its totient is φ = 53928.

The previous prime is 165887. The next prime is 165901. The reversal of 165894 is 498561.

It is an interprime number because it is at equal distance from previous prime (165887) and next prime (165901).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64 + ... + 579.

It is an arithmetic number, because the mean of its divisors is an integer number (21252).

165894 is a Friedman number, since it can be written as 6+18*9*4^5, using all its digits and the basic arithmetic operations.

2¹⁶⁵⁸⁹⁴ is an apocalyptic number.

165894 is an abundant number, since it is smaller than the sum of its proper divisors (174138).

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

165894 is a wasteful number, since it uses less digits than its factorization.

165894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691.

The product of its digits is 8640, while the sum is 33.

The square root of 165894 is about 407.3008715925. The cubic root of 165894 is about 54.9469460849.

The spelling of 165894 in words is "one hundred sixty-five thousand, eight hundred ninety-four".