4722221 has 4 divisors (see below), whose sum is σ = 5396832. Its totient is φ = 4047612.

The previous prime is 4722197. The next prime is 4722229. The reversal of 4722221 is 1222274.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1222274 = 2 ⋅611137.

It is a cyclic number.

It is not a de Polignac number, because 4722221 - 2¹⁴ = 4705837 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4722193 and 4722202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4722229) 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, 337295 + ... + 337308.

It is an arithmetic number, because the mean of its divisors is an integer number (1349208).

Almost surely, 2^4722221 is an apocalyptic number.

It is an amenable number.

4722221 is a deficient number, since it is larger than the sum of its proper divisors (674611).

4722221 is an equidigital number, since it uses as much as digits as its factorization.

4722221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674610.

The product of its digits is 448, while the sum is 20.

The square root of 4722221 is about 2173.0671871804. The cubic root of 4722221 is about 167.7704371190.

Adding to 4722221 its reverse (1222274), we get a palindrome (5944495).

The spelling of 4722221 in words is "four million, seven hundred twenty-two thousand, two hundred twenty-one".