212634 has 12 divisors (see below), whose sum is σ = 460746. Its totient is φ = 70872.

The previous prime is 212633. The next prime is 212651. The reversal of 212634 is 436212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 189225 + 23409 = 435^2 + 153^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11813 = 212634 / (2 + 1 + 2 + 6 + 3 + 4).

It is not an unprimeable number, because it can be changed into a prime (212633) 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 5 ways as a sum of consecutive naturals, for example, 5889 + ... + 5924.

2²¹²⁶³⁴ is an apocalyptic number.

212634 is an abundant number, since it is smaller than the sum of its proper divisors (248112).

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

212634 is a wasteful number, since it uses less digits than its factorization.

212634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11821 (or 11818 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 212634 is about 461.1225433656. The cubic root of 212634 is about 59.6867002351.

Adding to 212634 its reverse (436212), we get a palindrome (648846).

The spelling of 212634 in words is "two hundred twelve thousand, six hundred thirty-four".