4082005 has 4 divisors (see below), whose sum is σ = 4898412. Its totient is φ = 3265600.

The previous prime is 4081999. The next prime is 4082021. The reversal of 4082005 is 5002804.

It is a happy number.

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 2775556 + 1306449 = 1666^2 + 1143^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4082005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408196 + ... + 408205.

It is an arithmetic number, because the mean of its divisors is an integer number (1224603).

Almost surely, 2^4082005 is an apocalyptic number.

It is an amenable number.

4082005 is a deficient number, since it is larger than the sum of its proper divisors (816407).

4082005 is an equidigital number, since it uses as much as digits as its factorization.

4082005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816406.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 4082005 is about 2020.3972381688. The cubic root of 4082005 is about 159.8175655019.

Adding to 4082005 its reverse (5002804), we get a palindrome (9084809).

The spelling of 4082005 in words is "four million, eighty-two thousand, five".