4421581 has 8 divisors (see below), whose sum is σ = 4708800. Its totient is φ = 4137408.

The previous prime is 4421579. The next prime is 4421587. The reversal of 4421581 is 1851244.

4421581 is nontrivially palindromic in base 12.

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 4421581 - 2¹ = 4421579 is a prime.

It is a super-2 number, since 2×4421581² = 39100757079122, which contains 22 as substring.

It is a Duffinian number.

4421581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421587) 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, 2730 + ... + 4036.

It is an arithmetic number, because the mean of its divisors is an integer number (588600).

Almost surely, 2^4421581 is an apocalyptic number.

It is an amenable number.

4421581 is a deficient number, since it is larger than the sum of its proper divisors (287219).

4421581 is a wasteful number, since it uses less digits than its factorization.

4421581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523.

The product of its digits is 1280, while the sum is 25.

The square root of 4421581 is about 2102.7555730517. The cubic root of 4421581 is about 164.1317229458.

The spelling of 4421581 in words is "four million, four hundred twenty-one thousand, five hundred eighty-one".