285212 has 12 divisors (see below), whose sum is σ = 504336. Its totient is φ = 141120.

The previous prime is 285199. The next prime is 285221. The reversal of 285212 is 212582.

It is a congruent number.

It is an unprimeable number.

285212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 767.

It is an arithmetic number, because the mean of its divisors is an integer number (42028).

2²⁸⁵²¹² is an apocalyptic number.

It is an amenable number.

285212 is a deficient number, since it is larger than the sum of its proper divisors (219124).

285212 is a wasteful number, since it uses less digits than its factorization.

285212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 746 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 285212 is about 534.0524318829. The cubic root of 285212 is about 65.8247570234.

Adding to 285212 its reverse (212582), we get a palindrome (497794).

The spelling of 285212 in words is "two hundred eighty-five thousand, two hundred twelve".