14286721 has 4 divisors (see below), whose sum is σ = 14346244. Its totient is φ = 14227200.

The previous prime is 14286677. The next prime is 14286743. The reversal of 14286721 is 12768241.

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 11806096 + 2480625 = 3436^2 + 1575^2 .

It is a cyclic number.

It is not a de Polignac number, because 14286721 - 2⁷ = 14286593 is a prime.

It is a super-2 number, since 2×14286721² = 408220793863682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14286751) 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, 29400 + ... + 29881.

It is an arithmetic number, because the mean of its divisors is an integer number (3586561).

Almost surely, 2^14286721 is an apocalyptic number.

It is an amenable number.

14286721 is a deficient number, since it is larger than the sum of its proper divisors (59523).

14286721 is an equidigital number, since it uses as much as digits as its factorization.

14286721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59522.

The product of its digits is 5376, while the sum is 31.

The square root of 14286721 is about 3779.7779035282. Note that the first 3 decimals coincide. The cubic root of 14286721 is about 242.6484498646.

The spelling of 14286721 in words is "fourteen million, two hundred eighty-six thousand, seven hundred twenty-one".