212603 has 4 divisors (see below), whose sum is σ = 213528.
Its totient is φ = 211680.
The previous prime is 212593. The next prime is 212627. The reversal of 212603 is 306212.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is not a de Polignac number, because 212603 - 24 = 212587 is a prime.
It is a Duffinian number.
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 (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188 + ... + 678.
It is an arithmetic number, because the mean of its divisors is an integer number (53382).
2212603 is an apocalyptic number.
212603 is a deficient number, since it is larger than the sum of its proper divisors (925).
212603 is an equidigital number, since it uses as much as digits as its factorization.
212603 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 924.
The product of its (nonzero) digits is 72, while the sum is 14.
The square root of 212603 is about 461.0889285160.
The cubic root of 212603 is about 59.6837995111.
Adding to 212603 its reverse (306212), we get a palindrome (518815).
The spelling of 212603 in words is "two hundred twelve thousand, six hundred three".