165241 has 4 divisors (see below), whose sum is σ = 166500. Its totient is φ = 163984.

The previous prime is 165233. The next prime is 165247. The reversal of 165241 is 142561.

165241 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, and also an emirpimes, since its reverse is a distinct semiprime: 142561 = 37 ⋅3853.

It can be written as a sum of positive squares in 2 ways, for example, as 9216 + 156025 = 96^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 165241 - 2³ = 165233 is a prime.

It is a Duffinian number.

165241 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (165247) 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, 406 + ... + 703.

It is an arithmetic number, because the mean of its divisors is an integer number (41625).

2¹⁶⁵²⁴¹ is an apocalyptic number.

It is an amenable number.

165241 is a deficient number, since it is larger than the sum of its proper divisors (1259).

165241 is a wasteful number, since it uses less digits than its factorization.

165241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258.

The product of its digits is 240, while the sum is 19.

The square root of 165241 is about 406.4984624817. The cubic root of 165241 is about 54.8747563393.

It can be divided in two parts, 165 and 241, that added together give a triangular number (406 = T₂₈).

The spelling of 165241 in words is "one hundred sixty-five thousand, two hundred forty-one".