165423 has 8 divisors (see below), whose sum is σ = 224128. Its totient is φ = 108504.

The previous prime is 165397. The next prime is 165437. The reversal of 165423 is 324561.

It is a happy number.

165423 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 165423 - 2⁵ = 165391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211 + ... + 612.

It is an arithmetic number, because the mean of its divisors is an integer number (28016).

2¹⁶⁵⁴²³ is an apocalyptic number.

165423 is a deficient number, since it is larger than the sum of its proper divisors (58705).

165423 is an equidigital number, since it uses as much as digits as its factorization.

165423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893.

The product of its digits is 720, while the sum is 21.

The square root of 165423 is about 406.7222639591. The cubic root of 165423 is about 54.8948956937.

Adding to 165423 its reverse (324561), we get a palindrome (489984).

It can be divided in two parts, 16 and 5423, that multiplied together give a palindrome (86768).

The spelling of 165423 in words is "one hundred sixty-five thousand, four hundred twenty-three".