4221329 has 4 divisors (see below), whose sum is σ = 4824384. Its totient is φ = 3618276.

The previous prime is 4221323. The next prime is 4221337. The reversal of 4221329 is 9231224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4221329 - 2⁴ = 4221313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301517 + ... + 301530.

It is an arithmetic number, because the mean of its divisors is an integer number (1206096).

Almost surely, 2^4221329 is an apocalyptic number.

It is an amenable number.

4221329 is a deficient number, since it is larger than the sum of its proper divisors (603055).

4221329 is an equidigital number, since it uses as much as digits as its factorization.

4221329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603054.

The product of its digits is 864, while the sum is 23.

The square root of 4221329 is about 2054.5873064925. The cubic root of 4221329 is about 161.6155211908.

The spelling of 4221329 in words is "four million, two hundred twenty-one thousand, three hundred twenty-nine".