165023 has 4 divisors (see below), whose sum is σ = 167880. Its totient is φ = 162168.

The previous prime is 165001. The next prime is 165037. The reversal of 165023 is 320561.

165023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 165023 - 2⁸ = 164767 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 164992 and 165010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340 + ... + 1457.

It is an arithmetic number, because the mean of its divisors is an integer number (41970).

2¹⁶⁵⁰²³ is an apocalyptic number.

165023 is a deficient number, since it is larger than the sum of its proper divisors (2857).

165023 is an equidigital number, since it uses as much as digits as its factorization.

165023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 165023 is about 406.2302302882. The cubic root of 165023 is about 54.8506139019.

Adding to 165023 its reverse (320561), we get a palindrome (485584).

It can be divided in two parts, 1650 and 23, that multiplied together give a triangular number (37950 = T₂₇₅).

The spelling of 165023 in words is "one hundred sixty-five thousand, twenty-three".