4221406 has 16 divisors (see below), whose sum is σ = 7662816. Its totient is φ = 1702656.

The previous prime is 4221379. The next prime is 4221407. The reversal of 4221406 is 6041224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221407) 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 7 ways as a sum of consecutive naturals, for example, 8631 + ... + 9106.

It is an arithmetic number, because the mean of its divisors is an integer number (478926).

Almost surely, 2^4221406 is an apocalyptic number.

4221406 is a deficient number, since it is larger than the sum of its proper divisors (3441410).

4221406 is a wasteful number, since it uses less digits than its factorization.

4221406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17763.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4221406 is about 2054.6060449634. The cubic root of 4221406 is about 161.6165038449.

The spelling of 4221406 in words is "four million, two hundred twenty-one thousand, four hundred six".