4221544 has 16 divisors (see below), whose sum is σ = 7946820. Its totient is φ = 2102400.

The previous prime is 4221541. The next prime is 4221551. The reversal of 4221544 is 4451224.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4202500 + 19044 = 2050^2 + 138^2 .

It is not an unprimeable number, because it can be changed into a prime (4221541) 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, 1444 + ... + 3244.

Almost surely, 2^4221544 is an apocalyptic number.

It is an amenable number.

4221544 is a deficient number, since it is larger than the sum of its proper divisors (3725276).

4221544 is a wasteful number, since it uses less digits than its factorization.

4221544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100 (or 2096 counting only the distinct ones).

The product of its digits is 1280, while the sum is 22.

The square root of 4221544 is about 2054.6396277693. The cubic root of 4221544 is about 161.6182649355.

Adding to 4221544 its reverse (4451224), we get a palindrome (8672768).

The spelling of 4221544 in words is "four million, two hundred twenty-one thousand, five hundred forty-four".