4030221 has 16 divisors (see below), whose sum is σ = 6039936. Its totient is φ = 2371776.

The previous prime is 4030219. The next prime is 4030277. The reversal of 4030221 is 1220304.

It is not a de Polignac number, because 4030221 - 2¹ = 4030219 is a prime.

It is a Curzon number.

4030221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4030197 and 4030206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4030121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1350 + ... + 3143.

It is an arithmetic number, because the mean of its divisors is an integer number (377496).

Almost surely, 2^4030221 is an apocalyptic number.

It is an amenable number.

4030221 is a deficient number, since it is larger than the sum of its proper divisors (2009715).

4030221 is a wasteful number, since it uses less digits than its factorization.

4030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 4030221 is about 2007.5410332046. The cubic root of 4030221 is about 159.1388763313.

Adding to 4030221 its reverse (1220304), we get a palindrome (5250525).

The spelling of 4030221 in words is "four million, thirty thousand, two hundred twenty-one".