14382721 has 2 divisors, whose sum is σ = 14382722. Its totient is φ = 14382720.

The previous prime is 14382713. The next prime is 14382727. The reversal of 14382721 is 12728341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 2686321 = 3420^2 + 1639^2 .

It is an emirp because it is prime and its reverse (12728341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14382721 - 2³ = 14382713 is a prime.

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 14382721.

It is not a weakly prime, because it can be changed into another prime (14382727) 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, 7191360 + 7191361.

It is an arithmetic number, because the mean of its divisors is an integer number (7191361).

Almost surely, 2^14382721 is an apocalyptic number.

It is an amenable number.

14382721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14382721 is an equidigital number, since it uses as much as digits as its factorization.

14382721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 28.

The square root of 14382721 is about 3792.4558006653. The cubic root of 14382721 is about 243.1907312751.

The spelling of 14382721 in words is "fourteen million, three hundred eighty-two thousand, seven hundred twenty-one".