14222721 has 4 divisors (see below), whose sum is σ = 18963632. Its totient is φ = 9481812.

The previous prime is 14222713. The next prime is 14222743. The reversal of 14222721 is 12722241.

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 not a de Polignac number, because 14222721 - 2³ = 14222713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14222701) 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, 2370451 + ... + 2370456.

It is an arithmetic number, because the mean of its divisors is an integer number (4740908).

Almost surely, 2^14222721 is an apocalyptic number.

It is an amenable number.

14222721 is a deficient number, since it is larger than the sum of its proper divisors (4740911).

14222721 is an equidigital number, since it uses as much as digits as its factorization.

14222721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740910.

The product of its digits is 448, while the sum is 21.

The square root of 14222721 is about 3771.3022949639. The cubic root of 14222721 is about 242.2855779884.

Adding to 14222721 its reverse (12722241), we get a palindrome (26944962).

The spelling of 14222721 in words is "fourteen million, two hundred twenty-two thousand, seven hundred twenty-one".