4423421 has 8 divisors (see below), whose sum is σ = 4591104. Its totient is φ = 4257360.

The previous prime is 4423411. The next prime is 4423423. The reversal of 4423421 is 1243244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4423421 - 2⁶ = 4423357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4423393 and 4423402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4423423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8840 + ... + 9326.

It is an arithmetic number, because the mean of its divisors is an integer number (573888).

Almost surely, 2^4423421 is an apocalyptic number.

It is an amenable number.

4423421 is a deficient number, since it is larger than the sum of its proper divisors (167683).

4423421 is a wasteful number, since it uses less digits than its factorization.

4423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811.

The product of its digits is 768, while the sum is 20.

The square root of 4423421 is about 2103.1930486762. The cubic root of 4423421 is about 164.1544870875.

Adding to 4423421 its reverse (1243244), we get a palindrome (5666665).

The spelling of 4423421 in words is "four million, four hundred twenty-three thousand, four hundred twenty-one".