4370221 has 4 divisors (see below), whose sum is σ = 4452732. Its totient is φ = 4287712.

The previous prime is 4370203. The next prime is 4370237. The reversal of 4370221 is 1220734.

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 2449225 + 1920996 = 1565^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 4370221 - 2¹¹ = 4368173 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4370281) 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, 41176 + ... + 41281.

It is an arithmetic number, because the mean of its divisors is an integer number (1113183).

Almost surely, 2^4370221 is an apocalyptic number.

It is an amenable number.

4370221 is a deficient number, since it is larger than the sum of its proper divisors (82511).

4370221 is an equidigital number, since it uses as much as digits as its factorization.

4370221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82510.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 4370221 is about 2090.5073546869. The cubic root of 4370221 is about 163.4937417138.

Adding to 4370221 its reverse (1220734), we get a palindrome (5590955).

The spelling of 4370221 in words is "four million, three hundred seventy thousand, two hundred twenty-one".