14281721 has 4 divisors (see below), whose sum is σ = 14482944. Its totient is φ = 14080500.

The previous prime is 14281697. The next prime is 14281739. The reversal of 14281721 is 12718241.

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.

It is a cyclic number.

It is not a de Polignac number, because 14281721 - 2¹⁴ = 14265337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14283721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100505 + ... + 100646.

It is an arithmetic number, because the mean of its divisors is an integer number (3620736).

Almost surely, 2^14281721 is an apocalyptic number.

It is an amenable number.

14281721 is a deficient number, since it is larger than the sum of its proper divisors (201223).

14281721 is an equidigital number, since it uses as much as digits as its factorization.

14281721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201222.

The product of its digits is 896, while the sum is 26.

The square root of 14281721 is about 3779.1164311251. The cubic root of 14281721 is about 242.6201395707.

Adding to 14281721 its reverse (12718241), we get a palindrome (26999962).

The spelling of 14281721 in words is "fourteen million, two hundred eighty-one thousand, seven hundred twenty-one".