4221722 has 4 divisors (see below), whose sum is σ = 6332586. Its totient is φ = 2110860.

The previous prime is 4221713. The next prime is 4221751. The reversal of 4221722 is 2271224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3243601 + 978121 = 1801^2 + 989^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4221694 and 4221703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055429 + ... + 1055432.

Almost surely, 2^4221722 is an apocalyptic number.

4221722 is a deficient number, since it is larger than the sum of its proper divisors (2110864).

4221722 is a wasteful number, since it uses less digits than its factorization.

4221722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110863.

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

The square root of 4221722 is about 2054.6829439113. The cubic root of 4221722 is about 161.6205364304.

Adding to 4221722 its reverse (2271224), we get a palindrome (6492946).

The spelling of 4221722 in words is "four million, two hundred twenty-one thousand, seven hundred twenty-two".