4052221 has 8 divisors (see below), whose sum is σ = 4175064. Its totient is φ = 3931200.

The previous prime is 4052207. The next prime is 4052231. The reversal of 4052221 is 1222504.

It can be written as a sum of positive squares in 4 ways, for example, as 2325625 + 1726596 = 1525^2 + 1314^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4052221 - 2⁹ = 4051709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4052195 and 4052204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4052201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4975 + ... + 5731.

It is an arithmetic number, because the mean of its divisors is an integer number (521883).

Almost surely, 2^4052221 is an apocalyptic number.

It is an amenable number.

4052221 is a deficient number, since it is larger than the sum of its proper divisors (122843).

4052221 is a wasteful number, since it uses less digits than its factorization.

4052221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 4052221 is about 2013.0129160043. The cubic root of 4052221 is about 159.4279178882.

Adding to 4052221 its reverse (1222504), we get a palindrome (5274725).

The spelling of 4052221 in words is "four million, fifty-two thousand, two hundred twenty-one".