4066015 has 4 divisors (see below), whose sum is σ = 4879224. Its totient is φ = 3252808.

The previous prime is 4065989. The next prime is 4066021. The reversal of 4066015 is 5106604.

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

It is a cyclic number.

It is not a de Polignac number, because 4066015 - 2⁵ = 4065983 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 406597 + ... + 406606.

It is an arithmetic number, because the mean of its divisors is an integer number (1219806).

Almost surely, 2^4066015 is an apocalyptic number.

4066015 is a deficient number, since it is larger than the sum of its proper divisors (813209).

4066015 is an equidigital number, since it uses as much as digits as its factorization.

4066015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813208.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4066015 is about 2016.4362127278. The cubic root of 4066015 is about 159.6086136979.

The spelling of 4066015 in words is "four million, sixty-six thousand, fifteen".