4381581 has 8 divisors (see below), whose sum is σ = 6043680. Its totient is φ = 2820272.

The previous prime is 4381561. The next prime is 4381591. The reversal of 4381581 is 1851834.

4381581 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 4381581 - 2⁵ = 4381549 is a prime.

It is a super-2 number, since 2×4381581² = 38396504119122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4381501) 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, 25095 + ... + 25268.

It is an arithmetic number, because the mean of its divisors is an integer number (755460).

Almost surely, 2^4381581 is an apocalyptic number.

It is an amenable number.

4381581 is a deficient number, since it is larger than the sum of its proper divisors (1662099).

4381581 is a wasteful number, since it uses less digits than its factorization.

4381581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50395.

The product of its digits is 3840, while the sum is 30.

The square root of 4381581 is about 2093.2226350773. Note that the first 3 decimals coincide. The cubic root of 4381581 is about 163.6352816146.

The spelling of 4381581 in words is "four million, three hundred eighty-one thousand, five hundred eighty-one".