14217421 has 2 divisors, whose sum is σ = 14217422. Its totient is φ = 14217420.

The previous prime is 14217403. The next prime is 14217451. The reversal of 14217421 is 12471241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8037225 + 6180196 = 2835^2 + 2486^2 .

It is a cyclic number.

It is not a de Polignac number, because 14217421 - 2¹⁷ = 14086349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 14217392 and 14217401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14217451) 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 as a sum of consecutive naturals, namely, 7108710 + 7108711.

It is an arithmetic number, because the mean of its divisors is an integer number (7108711).

Almost surely, 2^14217421 is an apocalyptic number.

It is an amenable number.

14217421 is a deficient number, since it is larger than the sum of its proper divisors (1).

14217421 is an equidigital number, since it uses as much as digits as its factorization.

14217421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 22.

The square root of 14217421 is about 3770.5995544475. The cubic root of 14217421 is about 242.2554788931.

Adding to 14217421 its reverse (12471241), we get a palindrome (26688662).

The spelling of 14217421 in words is "fourteen million, two hundred seventeen thousand, four hundred twenty-one".