14109721 has 4 divisors (see below), whose sum is σ = 14150500. Its totient is φ = 14068944.

The previous prime is 14109703. The next prime is 14109737. The reversal of 14109721 is 12790141.

14109721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11485321 + 2624400 = 3389^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 14109721 - 2⁷ = 14109593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14109521) 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, 19866 + ... + 20563.

It is an arithmetic number, because the mean of its divisors is an integer number (3537625).

Almost surely, 2^14109721 is an apocalyptic number.

It is an amenable number.

14109721 is a deficient number, since it is larger than the sum of its proper divisors (40779).

14109721 is an equidigital number, since it uses as much as digits as its factorization.

14109721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40778.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 14109721 is about 3756.2908566830. The cubic root of 14109721 is about 241.6422154149.

Adding to 14109721 its reverse (12790141), we get a palindrome (26899862).

The spelling of 14109721 in words is "fourteen million, one hundred nine thousand, seven hundred twenty-one".