14305721 has 8 divisors (see below), whose sum is σ = 15240960. Its totient is φ = 13380928.

The previous prime is 14305703. The next prime is 14305723. The reversal of 14305721 is 12750341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 14305721 - 2¹⁴ = 14289337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14305723) 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 in 7 ways as a sum of consecutive naturals, for example, 320 + ... + 5358.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^14305721 is an apocalyptic number.

It is an amenable number.

14305721 is a deficient number, since it is larger than the sum of its proper divisors (935239).

14305721 is a wasteful number, since it uses less digits than its factorization.

14305721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 14305721 is about 3782.2904436333. The cubic root of 14305721 is about 242.7559687812.

The spelling of 14305721 in words is "fourteen million, three hundred five thousand, seven hundred twenty-one".