4221504 has 112 divisors (see below), whose sum is σ = 14224000. Its totient is φ = 1202688.

The previous prime is 4221499. The next prime is 4221521. The reversal of 4221504 is 4051224.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11922 + ... + 12270.

It is an arithmetic number, because the mean of its divisors is an integer number (127000).

Almost surely, 2^4221504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7112000).

4221504 is an abundant number, since it is smaller than the sum of its proper divisors (10002496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221504 is a wasteful number, since it uses less digits than its factorization.

4221504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 4221504 is about 2054.6298936792. The cubic root of 4221504 is about 161.6177544784.

Adding to 4221504 its reverse (4051224), we get a palindrome (8272728).

The spelling of 4221504 in words is "four million, two hundred twenty-one thousand, five hundred four".