2442221 has 4 divisors (see below), whose sum is σ = 2448444. Its totient is φ = 2436000.

The previous prime is 2442199. The next prime is 2442227. The reversal of 2442221 is 1222442.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1144900 + 1297321 = 1070^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2442221 - 2¹⁴ = 2425837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2442221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2442227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2480 + ... + 3321.

It is an arithmetic number, because the mean of its divisors is an integer number (612111).

2^2442221 is an apocalyptic number.

It is an amenable number.

2442221 is a deficient number, since it is larger than the sum of its proper divisors (6223).

2442221 is an equidigital number, since it uses as much as digits as its factorization.

2442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222.

The product of its digits is 256, while the sum is 17.

The square root of 2442221 is about 1562.7606982517. The cubic root of 2442221 is about 134.6671452401.

Adding to 2442221 its reverse (1222442), we get a palindrome (3664663).

The spelling of 2442221 in words is "two million, four hundred forty-two thousand, two hundred twenty-one".