4210221 has 4 divisors (see below), whose sum is σ = 5613632. Its totient is φ = 2806812.

The previous prime is 4210211. The next prime is 4210247. The reversal of 4210221 is 1220124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4210221 - 2⁷ = 4210093 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4210197 and 4210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4210211) 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, 701701 + ... + 701706.

It is an arithmetic number, because the mean of its divisors is an integer number (1403408).

Almost surely, 2^4210221 is an apocalyptic number.

It is an amenable number.

4210221 is a deficient number, since it is larger than the sum of its proper divisors (1403411).

4210221 is a wasteful number, since it uses less digits than its factorization.

4210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403410.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 4210221 is about 2051.8823065663. The cubic root of 4210221 is about 161.4736383725.

Adding to 4210221 its reverse (1220124), we get a palindrome (5430345).

The spelling of 4210221 in words is "four million, two hundred ten thousand, two hundred twenty-one".