4221403 has 4 divisors (see below), whose sum is σ = 4229368. Its totient is φ = 4213440.

The previous prime is 4221379. The next prime is 4221407. The reversal of 4221403 is 3041224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3126 + ... + 4267.

It is an arithmetic number, because the mean of its divisors is an integer number (1057342).

Almost surely, 2^4221403 is an apocalyptic number.

4221403 is a deficient number, since it is larger than the sum of its proper divisors (7965).

4221403 is an equidigital number, since it uses as much as digits as its factorization.

4221403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7964.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4221403 is about 2054.6053148963. The cubic root of 4221403 is about 161.6164655599.

Adding to 4221403 its reverse (3041224), we get a palindrome (7262627).

It can be divided in two parts, 4221 and 403, that added together give a square (4624 = 68²).

The spelling of 4221403 in words is "four million, two hundred twenty-one thousand, four hundred three".