14139221 has 2 divisors, whose sum is σ = 14139222. Its totient is φ = 14139220.

The previous prime is 14139199. The next prime is 14139241. The reversal of 14139221 is 12293141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10491121 + 3648100 = 3239^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 14139221 - 2¹⁸ = 13877077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14139241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7069610 + 7069611.

It is an arithmetic number, because the mean of its divisors is an integer number (7069611).

Almost surely, 2^14139221 is an apocalyptic number.

It is an amenable number.

14139221 is a deficient number, since it is larger than the sum of its proper divisors (1).

14139221 is an equidigital number, since it uses as much as digits as its factorization.

14139221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 14139221 is about 3760.2155523321. The cubic root of 14139221 is about 241.8105032492.

The spelling of 14139221 in words is "fourteen million, one hundred thirty-nine thousand, two hundred twenty-one".