165143 has 4 divisors (see below), whose sum is σ = 180168. Its totient is φ = 150120.

The previous prime is 165133. The next prime is 165161. The reversal of 165143 is 341561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341561 = 11 ⋅31051.

It is a cyclic number.

It is not a de Polignac number, because 165143 - 2⁶ = 165079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165103) 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, 7496 + ... + 7517.

It is an arithmetic number, because the mean of its divisors is an integer number (45042).

2¹⁶⁵¹⁴³ is an apocalyptic number.

165143 is a deficient number, since it is larger than the sum of its proper divisors (15025).

165143 is a wasteful number, since it uses less digits than its factorization.

165143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15024.

The product of its digits is 360, while the sum is 20.

The square root of 165143 is about 406.3779029426. The cubic root of 165143 is about 54.8639059458.

The spelling of 165143 in words is "one hundred sixty-five thousand, one hundred forty-three".