165071 has 4 divisors (see below), whose sum is σ = 172272. Its totient is φ = 157872.

The previous prime is 165059. The next prime is 165079. The reversal of 165071 is 170561.

165071 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 de Polignac number, because none of the positive numbers 2^k-165071 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 (165079) 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, 3566 + ... + 3611.

It is an arithmetic number, because the mean of its divisors is an integer number (43068).

2¹⁶⁵⁰⁷¹ is an apocalyptic number.

165071 is a deficient number, since it is larger than the sum of its proper divisors (7201).

165071 is an equidigital number, since it uses as much as digits as its factorization.

165071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 165071 is about 406.2893057908. The cubic root of 165071 is about 54.8559314925.

The spelling of 165071 in words is "one hundred sixty-five thousand, seventy-one".