4005065 has 8 divisors (see below), whose sum is σ = 4936200. Its totient is φ = 3117312.

The previous prime is 4005049. The next prime is 4005091. The reversal of 4005065 is 5605004.

It can be written as a sum of positive squares in 4 ways, for example, as 868624 + 3136441 = 932^2 + 1771^2 .

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 4005065 - 2⁴ = 4005049 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10640 + ... + 11009.

It is an arithmetic number, because the mean of its divisors is an integer number (617025).

Almost surely, 2^4005065 is an apocalyptic number.

It is an amenable number.

4005065 is a deficient number, since it is larger than the sum of its proper divisors (931135).

4005065 is a wasteful number, since it uses less digits than its factorization.

4005065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21691.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 4005065 is about 2001.2658494063. The cubic root of 4005065 is about 158.8070784892.

The spelling of 4005065 in words is "four million, five thousand, sixty-five".