14431721 has 4 divisors (see below), whose sum is σ = 14445012. Its totient is φ = 14418432.

The previous prime is 14431687. The next prime is 14431777. The reversal of 14431721 is 12713441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3115225 + 11316496 = 1765^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 14431721 - 2¹⁰ = 14430697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14431421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4856 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (3611253).

Almost surely, 2^14431721 is an apocalyptic number.

It is an amenable number.

14431721 is a deficient number, since it is larger than the sum of its proper divisors (13291).

14431721 is a wasteful number, since it uses less digits than its factorization.

14431721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13290.

The product of its digits is 672, while the sum is 23.

The square root of 14431721 is about 3798.9105017097. The cubic root of 14431721 is about 243.4665909664.

The spelling of 14431721 in words is "fourteen million, four hundred thirty-one thousand, seven hundred twenty-one".