165259 has 4 divisors (see below), whose sum is σ = 168120. Its totient is φ = 162400.

The previous prime is 165247. The next prime is 165287. The reversal of 165259 is 952561.

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 165259 - 2¹¹ = 163211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165229) 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, 1342 + ... + 1459.

It is an arithmetic number, because the mean of its divisors is an integer number (42030).

2¹⁶⁵²⁵⁹ is an apocalyptic number.

165259 is a deficient number, since it is larger than the sum of its proper divisors (2861).

165259 is an equidigital number, since it uses as much as digits as its factorization.

165259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860.

The product of its digits is 2700, while the sum is 28.

The square root of 165259 is about 406.5206021839. The cubic root of 165259 is about 54.8767488023.

It can be divided in two parts, 1652 and 59, that added together give a triangular number (1711 = T₅₈).

The spelling of 165259 in words is "one hundred sixty-five thousand, two hundred fifty-nine".