4493581 has 4 divisors (see below), whose sum is σ = 4537312. Its totient is φ = 4449852.

The previous prime is 4493569. The next prime is 4493597. The reversal of 4493581 is 1853944.

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 4493581 - 2¹¹ = 4491533 is a prime.

It is a super-2 number, since 2×4493581² = 40384540407122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4493501) 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, 21711 + ... + 21916.

It is an arithmetic number, because the mean of its divisors is an integer number (1134328).

Almost surely, 2^4493581 is an apocalyptic number.

It is an amenable number.

4493581 is a deficient number, since it is larger than the sum of its proper divisors (43731).

4493581 is a wasteful number, since it uses less digits than its factorization.

4493581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43730.

The product of its digits is 17280, while the sum is 34.

The square root of 4493581 is about 2119.8068308221. The cubic root of 4493581 is about 165.0178248267.

The spelling of 4493581 in words is "four million, four hundred ninety-three thousand, five hundred eighty-one".