4220321 has 12 divisors (see below), whose sum is σ = 5026032. Its totient is φ = 3531528.

The previous prime is 4220297. The next prime is 4220323. The reversal of 4220321 is 1230224.

4220321 = 113² + 114² + ... + 241².

It is not a de Polignac number, because 4220321 - 2¹⁸ = 3958177 is a prime.

It is a super-2 number, since 2×4220321² = 35622218686082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4220296 and 4220305.

It is not an unprimeable number, because it can be changed into a prime (4220323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1106 + ... + 3108.

It is an arithmetic number, because the mean of its divisors is an integer number (418836).

Almost surely, 2^4220321 is an apocalyptic number.

It is an amenable number.

4220321 is a deficient number, since it is larger than the sum of its proper divisors (805711).

4220321 is a wasteful number, since it uses less digits than its factorization.

4220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 4220321 is about 2054.3419871093. The cubic root of 4220321 is about 161.6026562523.

Adding to 4220321 its reverse (1230224), we get a palindrome (5450545).

It can be divided in two parts, 42203 and 21, that added together give a palindrome (42224).

The spelling of 4220321 in words is "four million, two hundred twenty thousand, three hundred twenty-one".