171265 has 4 divisors (see below), whose sum is σ = 205524. Its totient is φ = 137008.

The previous prime is 171263. The next prime is 171271. The reversal of 171265 is 562171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562171 = 53 ⋅10607.

It can be written as a sum of positive squares in 2 ways, for example, as 46656 + 124609 = 216^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 171265 - 2¹ = 171263 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17122 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (51381).

2¹⁷¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

171265 is a deficient number, since it is larger than the sum of its proper divisors (34259).

171265 is an equidigital number, since it uses as much as digits as its factorization.

171265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34258.

The product of its digits is 420, while the sum is 22.

The square root of 171265 is about 413.8417571971. The cubic root of 171265 is about 55.5336483995.

The spelling of 171265 in words is "one hundred seventy-one thousand, two hundred sixty-five".