2222421 has 16 divisors (see below), whose sum is σ = 3194880. Its totient is φ = 1370160.

The previous prime is 2222387. The next prime is 2222443. The reversal of 2222421 is 1242222.

2222421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2222421 - 2⁷ = 2222293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2222421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1620 + ... + 2658.

It is an arithmetic number, because the mean of its divisors is an integer number (199680).

2^2222421 is an apocalyptic number.

It is an amenable number.

2222421 is a deficient number, since it is larger than the sum of its proper divisors (972459).

2222421 is a wasteful number, since it uses less digits than its factorization.

2222421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096.

The product of its digits is 128, while the sum is 15.

The square root of 2222421 is about 1490.7786556025. The cubic root of 2222421 is about 130.4994788664.

Adding to 2222421 its reverse (1242222), we get a palindrome (3464643).

The spelling of 2222421 in words is "two million, two hundred twenty-two thousand, four hundred twenty-one".