4006705 has 4 divisors (see below), whose sum is σ = 4808052. Its totient is φ = 3205360.

The previous prime is 4006699. The next prime is 4006721. The reversal of 4006705 is 5076004.

4006705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1343281 + 2663424 = 1159^2 + 1632^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4006705 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 an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400666 + ... + 400675.

It is an arithmetic number, because the mean of its divisors is an integer number (1202013).

Almost surely, 2^4006705 is an apocalyptic number.

It is an amenable number.

4006705 is a deficient number, since it is larger than the sum of its proper divisors (801347).

4006705 is an equidigital number, since it uses as much as digits as its factorization.

4006705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801346.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 4006705 is about 2001.6755481346. The cubic root of 4006705 is about 158.8287517178.

Subtracting from 4006705 its product of nonzero digits (840), we obtain a triangular number (4005865 = T₂₈₃₀).

The spelling of 4006705 in words is "four million, six thousand, seven hundred five".