4082381 has 4 divisors (see below), whose sum is σ = 4091772. Its totient is φ = 4072992.

The previous prime is 4082357. The next prime is 4082389. The reversal of 4082381 is 1832804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2353156 + 1729225 = 1534^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 4082381 - 2¹⁸ = 3820237 is a prime.

It is a super-2 number, since 2×4082381² = 33331669258322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4082381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4082389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4010 + ... + 4923.

It is an arithmetic number, because the mean of its divisors is an integer number (1022943).

Almost surely, 2^4082381 is an apocalyptic number.

It is an amenable number.

4082381 is a deficient number, since it is larger than the sum of its proper divisors (9391).

4082381 is an equidigital number, since it uses as much as digits as its factorization.

4082381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9390.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 4082381 is about 2020.4902870343. The cubic root of 4082381 is about 159.8224723683.

It can be divided in two parts, 40823 and 81, that added together give a palindrome (40904).

The spelling of 4082381 in words is "four million, eighty-two thousand, three hundred eighty-one".