171485 has 4 divisors (see below), whose sum is σ = 205788. Its totient is φ = 137184.

The previous prime is 171481. The next prime is 171491. The reversal of 171485 is 584171.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120409 + 51076 = 347^2 + 226^2 .

It is a cyclic number.

It is not a de Polignac number, because 171485 - 2² = 171481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171481) 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, 17144 + ... + 17153.

It is an arithmetic number, because the mean of its divisors is an integer number (51447).

2¹⁷¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

171485 is a deficient number, since it is larger than the sum of its proper divisors (34303).

171485 is an equidigital number, since it uses as much as digits as its factorization.

171485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34302.

The product of its digits is 1120, while the sum is 26.

The square root of 171485 is about 414.1074739726. The cubic root of 171485 is about 55.5574169747.

Subtracting 171485 from its reverse (584171), we obtain a triangular number (412686 = T₉₀₈).

It can be divided in two parts, 171 and 485, that added together give a palindrome (656).

The spelling of 171485 in words is "one hundred seventy-one thousand, four hundred eighty-five".