14142221 has 2 divisors, whose sum is σ = 14142222. Its totient is φ = 14142220.

The previous prime is 14142211. The next prime is 14142223. The reversal of 14142221 is 12224141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11485321 + 2656900 = 3389^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 14142221 - 2⁶ = 14142157 is a prime.

Together with 14142223, it forms a pair of twin primes.

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 14142221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14142223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7071110 + 7071111.

It is an arithmetic number, because the mean of its divisors is an integer number (7071111).

Almost surely, 2^14142221 is an apocalyptic number.

It is an amenable number.

14142221 is a deficient number, since it is larger than the sum of its proper divisors (1).

14142221 is an equidigital number, since it uses as much as digits as its factorization.

14142221 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 14142221 is about 3760.6144444758. The cubic root of 14142221 is about 241.8276041491.

Adding to 14142221 its reverse (12224141), we get a palindrome (26366362).

The spelling of 14142221 in words is "fourteen million, one hundred forty-two thousand, two hundred twenty-one".