210285 has 12 divisors (see below), whose sum is σ = 364572. Its totient is φ = 112128.

The previous prime is 210283. The next prime is 210299. The reversal of 210285 is 582012.

It can be written as a sum of positive squares in 2 ways, for example, as 149769 + 60516 = 387^2 + 246^2 .

It is not a de Polignac number, because 210285 - 2¹ = 210283 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 210285.

It is not an unprimeable number, because it can be changed into a prime (210283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2292 + ... + 2381.

It is an arithmetic number, because the mean of its divisors is an integer number (30381).

2²¹⁰²⁸⁵ is an apocalyptic number.

It is an amenable number.

210285 is a deficient number, since it is larger than the sum of its proper divisors (154287).

210285 is a wasteful number, since it uses less digits than its factorization.

210285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684 (or 4681 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 210285 is about 458.5684245562. The cubic root of 210285 is about 59.4660965434.

Adding to 210285 its reverse (582012), we get a palindrome (792297).

It can be divided in two parts, 2102 and 85, that added together give a 7-th power (2187 = 3⁷).

The spelling of 210285 in words is "two hundred ten thousand, two hundred eighty-five".