201285 has 40 divisors (see below), whose sum is σ = 418176. Its totient is φ = 90720.

The previous prime is 201281. The next prime is 201287. The reversal of 201285 is 582102.

It is not a de Polignac number, because 201285 - 2² = 201281 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201281) 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 39 ways as a sum of consecutive naturals, for example, 2800 + ... + 2870.

2²⁰¹²⁸⁵ is an apocalyptic number.

It is an amenable number.

201285 is an abundant number, since it is smaller than the sum of its proper divisors (216891).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201285 is an equidigital number, since it uses as much as digits as its factorization.

201285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 86 counting only the distinct ones).

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

The square root of 201285 is about 448.6479689021. The cubic root of 201285 is about 58.6053329101.

Adding to 201285 its reverse (582102), we get a palindrome (783387).

The spelling of 201285 in words is "two hundred one thousand, two hundred eighty-five".