4221423 has 24 divisors (see below), whose sum is σ = 6655760. Its totient is φ = 2643840.

The previous prime is 4221421. The next prime is 4221433. The reversal of 4221423 is 3241224.

4221423 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4221423 - 2¹ = 4221421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4221396 and 4221405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7533 + ... + 8073.

Almost surely, 2^4221423 is an apocalyptic number.

4221423 is a deficient number, since it is larger than the sum of its proper divisors (2434337).

4221423 is a wasteful number, since it uses less digits than its factorization.

4221423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 561 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 4221423 is about 2054.6101820053. The cubic root of 4221423 is about 161.6167207930.

Adding to 4221423 its reverse (3241224), we get a palindrome (7462647).

The spelling of 4221423 in words is "four million, two hundred twenty-one thousand, four hundred twenty-three".