212284 has 12 divisors (see below), whose sum is σ = 377104. Its totient is φ = 104544.

The previous prime is 212281. The next prime is 212293. The reversal of 212284 is 482212.

212284 is nontrivially palindromic in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212281) 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 3 ways as a sum of consecutive naturals, for example, 72 + ... + 655.

2²¹²²⁸⁴ is an apocalyptic number.

It is an amenable number.

212284 is a deficient number, since it is larger than the sum of its proper divisors (164820).

212284 is a wasteful number, since it uses less digits than its factorization.

212284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 802 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

The square root of 212284 is about 460.7428784040. The cubic root of 212284 is about 59.6539337325.

Adding to 212284 its reverse (482212), we get a palindrome (694496).

It can be divided in two parts, 212 and 284, that added together give a triangular number (496 = T₃₁).

The spelling of 212284 in words is "two hundred twelve thousand, two hundred eighty-four".