4006065 has 16 divisors (see below), whose sum is σ = 7325568. Its totient is φ = 1831296.

The previous prime is 4006063. The next prime is 4006091. The reversal of 4006065 is 5606004.

It is not a de Polignac number, because 4006065 - 2¹ = 4006063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4006063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18972 + ... + 19181.

It is an arithmetic number, because the mean of its divisors is an integer number (457848).

Almost surely, 2^4006065 is an apocalyptic number.

It is an amenable number.

4006065 is a deficient number, since it is larger than the sum of its proper divisors (3319503).

4006065 is a wasteful number, since it uses less digits than its factorization.

4006065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38168.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 4006065 is about 2001.5156756818. The cubic root of 4006065 is about 158.8202945763.

The spelling of 4006065 in words is "four million, six thousand, sixty-five".