14916721 has 4 divisors (see below), whose sum is σ = 14959332. Its totient is φ = 14874112.

The previous prime is 14916709. The next prime is 14916731. The reversal of 14916721 is 12761941.

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 6964321 + 7952400 = 2639^2 + 2820^2 .

It is a cyclic number.

It is not a de Polignac number, because 14916721 - 2⁵ = 14916689 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14916731) 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 3 ways as a sum of consecutive naturals, for example, 20776 + ... + 21481.

It is an arithmetic number, because the mean of its divisors is an integer number (3739833).

Almost surely, 2^14916721 is an apocalyptic number.

It is an amenable number.

14916721 is a deficient number, since it is larger than the sum of its proper divisors (42611).

14916721 is an equidigital number, since it uses as much as digits as its factorization.

14916721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42610.

The product of its digits is 3024, while the sum is 31.

The square root of 14916721 is about 3862.2171093816. The cubic root of 14916721 is about 246.1639520015.

The spelling of 14916721 in words is "fourteen million, nine hundred sixteen thousand, seven hundred twenty-one".