3205705 has 8 divisors (see below), whose sum is σ = 3919752. Its totient is φ = 2515968.

The previous prime is 3205703. The next prime is 3205751. The reversal of 3205705 is 5075023.

It can be written as a sum of positive squares in 4 ways, for example, as 51529 + 3154176 = 227^2 + 1776^2 .

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 3205705 - 2¹ = 3205703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3205703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5784 + ... + 6313.

It is an arithmetic number, because the mean of its divisors is an integer number (489969).

Almost surely, 2^3205705 is an apocalyptic number.

It is an amenable number.

3205705 is a deficient number, since it is larger than the sum of its proper divisors (714047).

3205705 is a wasteful number, since it uses less digits than its factorization.

3205705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12155.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 3205705 is about 1790.4482678927. The cubic root of 3205705 is about 147.4487804541.

The spelling of 3205705 in words is "three million, two hundred five thousand, seven hundred five".