172285 has 4 divisors (see below), whose sum is σ = 206748. Its totient is φ = 137824.

The previous prime is 172283. The next prime is 172297. The reversal of 172285 is 582271.

172285 = 293² + 294².

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 85849 + 86436 = 293^2 + 294^2 .

It is a cyclic number.

It is not a de Polignac number, because 172285 - 2¹ = 172283 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 (172283) 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, 17224 + ... + 17233.

It is an arithmetic number, because the mean of its divisors is an integer number (51687).

172285 is a Friedman number, since it can be written as (587^2+1)/2, using all its digits and the basic arithmetic operations.

2¹⁷²²⁸⁵ is an apocalyptic number.

172285 is the 294-th centered square number.

It is an amenable number.

172285 is a deficient number, since it is larger than the sum of its proper divisors (34463).

172285 is an equidigital number, since it uses as much as digits as its factorization.

172285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34462.

The product of its digits is 1120, while the sum is 25.

The square root of 172285 is about 415.0722828617. The cubic root of 172285 is about 55.6436771855.

The spelling of 172285 in words is "one hundred seventy-two thousand, two hundred eighty-five".