14065721 has 2 divisors, whose sum is σ = 14065722. Its totient is φ = 14065720.

The previous prime is 14065717. The next prime is 14065729. The reversal of 14065721 is 12756041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13875625 + 190096 = 3725^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 14065721 - 2² = 14065717 is a prime.

It is not a weakly prime, because it can be changed into another prime (14065729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7032860 + 7032861.

It is an arithmetic number, because the mean of its divisors is an integer number (7032861).

Almost surely, 2^14065721 is an apocalyptic number.

It is an amenable number.

14065721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14065721 is an equidigital number, since it uses as much as digits as its factorization.

14065721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 14065721 is about 3750.4294420773. The cubic root of 14065721 is about 241.3907734338.

The spelling of 14065721 in words is "fourteen million, sixty-five thousand, seven hundred twenty-one".