4221603 has 12 divisors (see below), whose sum is σ = 6189768. Its totient is φ = 2772000.

The previous prime is 4221583. The next prime is 4221619. The reversal of 4221603 is 3061224.

It is a happy number.

4221603 is a `hidden beast` number, since 42 + 21 + 603 = 666.

It is not a de Polignac number, because 4221603 - 2⁵ = 4221571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4221643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2898 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (515814).

Almost surely, 2^4221603 is an apocalyptic number.

4221603 is a deficient number, since it is larger than the sum of its proper divisors (1968165).

4221603 is a wasteful number, since it uses less digits than its factorization.

4221603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074 (or 7071 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 4221603 is about 2054.6539854681. The cubic root of 4221603 is about 161.6190178538.

Adding to 4221603 its reverse (3061224), we get a palindrome (7282827).

It can be divided in two parts, 422 and 1603, that added together give a square (2025 = 45²).

The spelling of 4221603 in words is "four million, two hundred twenty-one thousand, six hundred three".