212606 has 4 divisors (see below), whose sum is σ = 318912. Its totient is φ = 106302.

The previous prime is 212593. The next prime is 212627. The reversal of 212606 is 606212.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×212606² = 90402622472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53150 + ... + 53153.

It is an arithmetic number, because the mean of its divisors is an integer number (79728).

2²¹²⁶⁰⁶ is an apocalyptic number.

212606 is a deficient number, since it is larger than the sum of its proper divisors (106306).

212606 is a wasteful number, since it uses less digits than its factorization.

212606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106305.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212606 is about 461.0921816730. The cubic root of 212606 is about 59.6840802386.

Adding to 212606 its reverse (606212), we get a palindrome (818818).

It can be divided in two parts, 212 and 606, that added together give a palindrome (818).

The spelling of 212606 in words is "two hundred twelve thousand, six hundred six".