14221421 has 2 divisors, whose sum is σ = 14221422. Its totient is φ = 14221420.

The previous prime is 14221393. The next prime is 14221483. The reversal of 14221421 is 12412241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9853321 + 4368100 = 3139^2 + 2090^2 .

It is an emirp because it is prime and its reverse (12412241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14221421 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 14221421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14221021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7110710 + 7110711.

It is an arithmetic number, because the mean of its divisors is an integer number (7110711).

Almost surely, 2^14221421 is an apocalyptic number.

It is an amenable number.

14221421 is a deficient number, since it is larger than the sum of its proper divisors (1).

14221421 is an equidigital number, since it uses as much as digits as its factorization.

14221421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 17.

The square root of 14221421 is about 3771.1299367696. The cubic root of 14221421 is about 242.2781958836.

Adding to 14221421 its reverse (12412241), we get a palindrome (26633662).

The spelling of 14221421 in words is "fourteen million, two hundred twenty-one thousand, four hundred twenty-one".