4005005 has 4 divisors (see below), whose sum is σ = 4806012. Its totient is φ = 3204000.

The previous prime is 4004989. The next prime is 4005019. The reversal of 4005005 is 5005004.

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 630436 + 3374569 = 794^2 + 1837^2 .

It is not a de Polignac number, because 4005005 - 2⁴ = 4004989 is a prime.

It is a Duffinian number.

It is a Curzon 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, 400496 + ... + 400505.

It is an arithmetic number, because the mean of its divisors is an integer number (1201503).

Almost surely, 2^4005005 is an apocalyptic number.

It is an amenable number.

4005005 is a deficient number, since it is larger than the sum of its proper divisors (801007).

4005005 is an equidigital number, since it uses as much as digits as its factorization.

4005005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801006.

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 4005005 is about 2001.2508588380. The cubic root of 4005005 is about 158.8062854540.

Subtracting 4005005 from its reverse (5005004), we obtain a palindrome (999999).

The spelling of 4005005 in words is "four million, five thousand, five".