14409721 has 2 divisors, whose sum is σ = 14409722. Its totient is φ = 14409720.

The previous prime is 14409709. The next prime is 14409739. The reversal of 14409721 is 12790441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8934121 + 5475600 = 2989^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 14409721 - 2⁹ = 14409209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 14409721.

It is not a weakly prime, because it can be changed into another prime (14409821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7204860 + 7204861.

It is an arithmetic number, because the mean of its divisors is an integer number (7204861).

Almost surely, 2^14409721 is an apocalyptic number.

It is an amenable number.

14409721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14409721 is an equidigital number, since it uses as much as digits as its factorization.

14409721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 14409721 is about 3796.0138303225. The cubic root of 14409721 is about 243.3428129582.

The spelling of 14409721 in words is "fourteen million, four hundred nine thousand, seven hundred twenty-one".