14221220 has 48 divisors (see below), whose sum is σ = 32598720. Its totient is φ = 5179776.

The previous prime is 14221211. The next prime is 14221237. The reversal of 14221220 is 2212241.

It is a junction number, because it is equal to n+sod(n) for n = 14221195 and 14221204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21251 + ... + 21909.

It is an arithmetic number, because the mean of its divisors is an integer number (679140).

Almost surely, 2^14221220 is an apocalyptic number.

14221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 14221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16299360).

14221220 is an abundant number, since it is smaller than the sum of its proper divisors (18377500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

14221220 is a wasteful number, since it uses less digits than its factorization.

14221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 14221220 is about 3771.1032868380. The cubic root of 14221220 is about 242.2770544565.

Adding to 14221220 its reverse (2212241), we get a palindrome (16433461).

It can be divided in two parts, 14221 and 220, that added together give a palindrome (14441).

The spelling of 14221220 in words is "fourteen million, two hundred twenty-one thousand, two hundred twenty".