14687221 has 2 divisors, whose sum is σ = 14687222. Its totient is φ = 14687220.

The previous prime is 14687219. The next prime is 14687227. The reversal of 14687221 is 12278641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14546596 + 140625 = 3814^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 14687221 - 2¹ = 14687219 is a prime.

Together with 14687219, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14687227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7343610 + 7343611.

It is an arithmetic number, because the mean of its divisors is an integer number (7343611).

Almost surely, 2^14687221 is an apocalyptic number.

It is an amenable number.

14687221 is a deficient number, since it is larger than the sum of its proper divisors (1).

14687221 is an equidigital number, since it uses as much as digits as its factorization.

14687221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 31.

The square root of 14687221 is about 3832.3910291096. The cubic root of 14687221 is about 244.8949765051.

The spelling of 14687221 in words is "fourteen million, six hundred eighty-seven thousand, two hundred twenty-one".