4221003 has 8 divisors (see below), whose sum is σ = 5691600. Its totient is φ = 2782208.

The previous prime is 4220987. The next prime is 4221011. The reversal of 4221003 is 3001224.

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 4221003 - 2⁴ = 4220987 is a prime.

4221003 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4221003.

It is not an unprimeable number, because it can be changed into a prime (4221703) 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, 7638 + ... + 8171.

It is an arithmetic number, because the mean of its divisors is an integer number (711450).

Almost surely, 2^4221003 is an apocalyptic number.

4221003 is a deficient number, since it is larger than the sum of its proper divisors (1470597).

4221003 is a wasteful number, since it uses less digits than its factorization.

4221003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15901.

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

The square root of 4221003 is about 2054.5079702936. The cubic root of 4221003 is about 161.6113607304.

Adding to 4221003 its reverse (3001224), we get a palindrome (7222227).

The spelling of 4221003 in words is "four million, two hundred twenty-one thousand, three".