2242421 has 4 divisors (see below), whose sum is σ = 2279244. Its totient is φ = 2205600.

The previous prime is 2242381. The next prime is 2242433. The reversal of 2242421 is 1242422.

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 34225 + 2208196 = 185^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2242421 - 2¹⁰ = 2241397 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 2242421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2242441) 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, 18320 + ... + 18441.

It is an arithmetic number, because the mean of its divisors is an integer number (569811).

2^2242421 is an apocalyptic number.

It is an amenable number.

2242421 is a deficient number, since it is larger than the sum of its proper divisors (36823).

2242421 is an equidigital number, since it uses as much as digits as its factorization.

2242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36822.

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

The square root of 2242421 is about 1497.4715356226. The cubic root of 2242421 is about 130.8897738373.

Adding to 2242421 its reverse (1242422), we get a palindrome (3484843).

Subtracting from 2242421 its reverse (1242422), we obtain a palindrome (999999).

The spelling of 2242421 in words is "two million, two hundred forty-two thousand, four hundred twenty-one".