Adding to 21467 its reverse (76412), we get a palindrome (97879).
Subtracting 21467 from its reverse (76412), we obtain a palindrome (54945).
It is a strong prime.
It is a cyclic number.
It is a Chen prime.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 21467.
It is a good prime.
221467 is an apocalyptic number.
21467 is an equidigital number, since it uses as much as digits as its factorization.
21467 is an evil number, because the sum of its binary digits is even.
The square root of 21467 is about 146.5162107072. The cubic root of 21467 is about 27.7922549720.
The spelling of 21467 in words is "twenty-one thousand, four hundred sixty-seven".