2603221 has 4 divisors (see below), whose sum is σ = 2611852. Its totient is φ = 2594592.

The previous prime is 2603219. The next prime is 2603231. The reversal of 2603221 is 1223062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1223062 = 2 ⋅611531.

It can be written as a sum of positive squares in 2 ways, for example, as 1234321 + 1368900 = 1111^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 2603221 - 2¹ = 2603219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2603195 and 2603204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2603231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3846 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (652963).

2^2603221 is an apocalyptic number.

It is an amenable number.

2603221 is a deficient number, since it is larger than the sum of its proper divisors (8631).

2603221 is an equidigital number, since it uses as much as digits as its factorization.

2603221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8630.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2603221 is about 1613.4500302148. The cubic root of 2603221 is about 137.5636465675.

Adding to 2603221 its reverse (1223062), we get a palindrome (3826283).

It can be divided in two parts, 260 and 3221, that added together give a square (3481 = 59²).

The spelling of 2603221 in words is "two million, six hundred three thousand, two hundred twenty-one".