212426 has 4 divisors (see below), whose sum is σ = 318642. Its totient is φ = 106212.

The previous prime is 212423. The next prime is 212437. The reversal of 212426 is 624212.

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

It can be written as a sum of positive squares in only one way, i.e., 203401 + 9025 = 451^2 + 95^2 .

It is not an unprimeable number, because it can be changed into a prime (212423) 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 as a sum of consecutive naturals, namely, 53105 + ... + 53108.

2²¹²⁴²⁶ is an apocalyptic number.

212426 is a deficient number, since it is larger than the sum of its proper divisors (106216).

212426 is a wasteful number, since it uses less digits than its factorization.

212426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106215.

The product of its digits is 192, while the sum is 17.

The square root of 212426 is about 460.8969516063. The cubic root of 212426 is about 59.6672319093.

Adding to 212426 its reverse (624212), we get a palindrome (836638).

The spelling of 212426 in words is "two hundred twelve thousand, four hundred twenty-six".