4263221 has 4 divisors (see below), whose sum is σ = 4367244. Its totient is φ = 4159200.

The previous prime is 4263199. The next prime is 4263223. The reversal of 4263221 is 1223624.

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

It can be written as a sum of positive squares in 2 ways, for example, as 784996 + 3478225 = 886^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 4263221 - 2⁶ = 4263157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4263193 and 4263202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4263223) 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, 51950 + ... + 52031.

It is an arithmetic number, because the mean of its divisors is an integer number (1091811).

Almost surely, 2^4263221 is an apocalyptic number.

4263221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4263221 is a deficient number, since it is larger than the sum of its proper divisors (104023).

4263221 is a wasteful number, since it uses less digits than its factorization.

4263221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104022.

The product of its digits is 576, while the sum is 20.

The square root of 4263221 is about 2064.7568864154. The cubic root of 4263221 is about 162.1483805387.

Adding to 4263221 its reverse (1223624), we get a palindrome (5486845).

The spelling of 4263221 in words is "four million, two hundred sixty-three thousand, two hundred twenty-one".