14311721 has 2 divisors, whose sum is σ = 14311722. Its totient is φ = 14311720.

The previous prime is 14311709. The next prime is 14311751. The reversal of 14311721 is 12711341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13957696 + 354025 = 3736^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 14311721 - 2⁶ = 14311657 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 14311693 and 14311702.

It is not a weakly prime, because it can be changed into another prime (14311751) 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, 7155860 + 7155861.

It is an arithmetic number, because the mean of its divisors is an integer number (7155861).

Almost surely, 2^14311721 is an apocalyptic number.

It is an amenable number.

14311721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14311721 is an equidigital number, since it uses as much as digits as its factorization.

14311721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 20.

The square root of 14311721 is about 3783.0835306665. The cubic root of 14311721 is about 242.7899023436.

The spelling of 14311721 in words is "fourteen million, three hundred eleven thousand, seven hundred twenty-one".