212686 has 16 divisors (see below), whose sum is σ = 349200. Its totient is φ = 96768.

The previous prime is 212683. The next prime is 212701. The reversal of 212686 is 686212.

212686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 212686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1006 + ... + 1198.

It is an arithmetic number, because the mean of its divisors is an integer number (21825).

2²¹²⁶⁸⁶ is an apocalyptic number.

212686 is a deficient number, since it is larger than the sum of its proper divisors (136514).

212686 is a wasteful number, since it uses less digits than its factorization.

212686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its digits is 1152, while the sum is 25.

The square root of 212686 is about 461.1789240631. The cubic root of 212686 is about 59.6915653326.

Adding to 212686 its reverse (686212), we get a palindrome (898898).

It can be divided in two parts, 212 and 686, that added together give a palindrome (898).

The spelling of 212686 in words is "two hundred twelve thousand, six hundred eighty-six".