212456 has 8 divisors (see below), whose sum is σ = 398370. Its totient is φ = 106224.

The previous prime is 212453. The next prime is 212461. The reversal of 212456 is 654212.

It is a happy number.

212456 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 184900 + 27556 = 430^2 + 166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (212453) 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, 13271 + ... + 13286.

2²¹²⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

212456 is a deficient number, since it is larger than the sum of its proper divisors (185914).

212456 is a wasteful number, since it uses less digits than its factorization.

212456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26563 (or 26559 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 212456 is about 460.9294956932. The cubic root of 212456 is about 59.6700406250.

Adding to 212456 its reverse (654212), we get a palindrome (866668).

The spelling of 212456 in words is "two hundred twelve thousand, four hundred fifty-six".