212406 has 8 divisors (see below), whose sum is σ = 424824. Its totient is φ = 70800.

The previous prime is 212383. The next prime is 212411. The reversal of 212406 is 604212.

It is a sphenic number, since it is the product of 3 distinct primes.

212406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

212406 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, 17695 + ... + 17706.

It is an arithmetic number, because the mean of its divisors is an integer number (53103).

2²¹²⁴⁰⁶ is an apocalyptic number.

212406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212406 is a wasteful number, since it uses less digits than its factorization.

212406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35406.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212406 is about 460.8752542717. The cubic root of 212406 is about 59.6653592853.

Adding to 212406 its reverse (604212), we get a palindrome (816618).

The spelling of 212406 in words is "two hundred twelve thousand, four hundred six".