14226721 has 2 divisors, whose sum is σ = 14226722. Its totient is φ = 14226720.

The previous prime is 14226697. The next prime is 14226727. The reversal of 14226721 is 12762241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13987600 + 239121 = 3740^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 14226721 - 2¹⁷ = 14095649 is a prime.

It is not a weakly prime, because it can be changed into another prime (14226727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7113360 + 7113361.

It is an arithmetic number, because the mean of its divisors is an integer number (7113361).

Almost surely, 2^14226721 is an apocalyptic number.

It is an amenable number.

14226721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14226721 is an equidigital number, since it uses as much as digits as its factorization.

14226721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 14226721 is about 3771.8325784690. The cubic root of 14226721 is about 242.3082893358.

Adding to 14226721 its reverse (12762241), we get a palindrome (26988962).

The spelling of 14226721 in words is "fourteen million, two hundred twenty-six thousand, seven hundred twenty-one".