14517721 has 4 divisors (see below), whose sum is σ = 14528272. Its totient is φ = 14507172.

The previous prime is 14517709. The next prime is 14517733. The reversal of 14517721 is 12771541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (14517709) and next prime (14517733).

It is a cyclic number.

It is not a de Polignac number, because 14517721 - 2¹¹ = 14515673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14517721.

It is not an unprimeable number, because it can be changed into a prime (14517781) 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, 2835 + ... + 6088.

It is an arithmetic number, because the mean of its divisors is an integer number (3632068).

Almost surely, 2^14517721 is an apocalyptic number.

It is an amenable number.

14517721 is a deficient number, since it is larger than the sum of its proper divisors (10551).

14517721 is an equidigital number, since it uses as much as digits as its factorization.

14517721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550.

The product of its digits is 1960, while the sum is 28.

The square root of 14517721 is about 3810.2127237203. The cubic root of 14517721 is about 243.9492470360.

The spelling of 14517721 in words is "fourteen million, five hundred seventeen thousand, seven hundred twenty-one".