4723221 has 8 divisors (see below), whose sum is σ = 6362944. Its totient is φ = 3116160.

The previous prime is 4723219. The next prime is 4723223. The reversal of 4723221 is 1223274.

It is an interprime number because it is at equal distance from previous prime (4723219) and next prime (4723223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4723221 - 2¹ = 4723219 is a prime.

It is a super-2 number, since 2×4723221² = 44617633229682, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4¹¹ + 7⁴ + 2³ + 3⁷ + 2⁵ + 2¹⁹ + 1 .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4723223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7825 + ... + 8406.

It is an arithmetic number, because the mean of its divisors is an integer number (795368).

Almost surely, 2^4723221 is an apocalyptic number.

It is an amenable number.

4723221 is a deficient number, since it is larger than the sum of its proper divisors (1639723).

4723221 is a wasteful number, since it uses less digits than its factorization.

4723221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16331.

The product of its digits is 672, while the sum is 21.

The square root of 4723221 is about 2173.2972645269. The cubic root of 4723221 is about 167.7822789053.

Adding to 4723221 its reverse (1223274), we get a palindrome (5946495).

The spelling of 4723221 in words is "four million, seven hundred twenty-three thousand, two hundred twenty-one".