14171221 has 2 divisors, whose sum is σ = 14171222. Its totient is φ = 14171220.

The previous prime is 14171191. The next prime is 14171249. The reversal of 14171221 is 12217141.

14171221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13608721 + 562500 = 3689^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 14171221 - 2¹⁷ = 14040149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14171821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7085610 + 7085611.

It is an arithmetic number, because the mean of its divisors is an integer number (7085611).

Almost surely, 2^14171221 is an apocalyptic number.

It is an amenable number.

14171221 is a deficient number, since it is larger than the sum of its proper divisors (1).

14171221 is an equidigital number, since it uses as much as digits as its factorization.

14171221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112, while the sum is 19.

The square root of 14171221 is about 3764.4682227374. The cubic root of 14171221 is about 241.9927883014.

Adding to 14171221 its reverse (12217141), we get a palindrome (26388362).

The spelling of 14171221 in words is "fourteen million, one hundred seventy-one thousand, two hundred twenty-one".