2421603 has 8 divisors (see below), whose sum is σ = 3587600. Its totient is φ = 1614384.

The previous prime is 2421593. The next prime is 2421641. The reversal of 2421603 is 3061242.

It is a happy number.

It is not a de Polignac number, because 2421603 - 2⁸ = 2421347 is a prime.

It is a super-2 number, since 2×2421603² = 11728322179218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421673) 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, 44818 + ... + 44871.

It is an arithmetic number, because the mean of its divisors is an integer number (448450).

2^2421603 is an apocalyptic number.

2421603 is a deficient number, since it is larger than the sum of its proper divisors (1165997).

2421603 is an equidigital number, since it uses as much as digits as its factorization.

2421603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89698 (or 89692 counting only the distinct ones).

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

The square root of 2421603 is about 1556.1500570318. The cubic root of 2421603 is about 134.2871062500.

Adding to 2421603 its reverse (3061242), we get a palindrome (5482845).

The spelling of 2421603 in words is "two million, four hundred twenty-one thousand, six hundred three".