4022421 has 16 divisors (see below), whose sum is σ = 6116544. Its totient is φ = 2329344.

The previous prime is 4022419. The next prime is 4022437. The reversal of 4022421 is 1242204.

4022421 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 4022421 - 2¹ = 4022419 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4022421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4022441) 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, 2371 + ... + 3696.

It is an arithmetic number, because the mean of its divisors is an integer number (382284).

Almost surely, 2^4022421 is an apocalyptic number.

It is an amenable number.

4022421 is a deficient number, since it is larger than the sum of its proper divisors (2094123).

4022421 is a wasteful number, since it uses less digits than its factorization.

4022421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6100.

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

The square root of 4022421 is about 2005.5974172301. The cubic root of 4022421 is about 159.0361454156.

Adding to 4022421 its reverse (1242204), we get a palindrome (5264625).

The spelling of 4022421 in words is "four million, twenty-two thousand, four hundred twenty-one".