3661205 has 16 divisors (see below), whose sum is σ = 4898880. Its totient is φ = 2610432.

The previous prime is 3661181. The next prime is 3661211. The reversal of 3661205 is 5021663.

It is a cyclic number.

It is not a de Polignac number, because 3661205 - 2⁸ = 3660949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482 + ... + 2748.

It is an arithmetic number, because the mean of its divisors is an integer number (306180).

Almost surely, 2^3661205 is an apocalyptic number.

It is an amenable number.

3661205 is a deficient number, since it is larger than the sum of its proper divisors (1237675).

3661205 is a wasteful number, since it uses less digits than its factorization.

3661205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 3661205 is about 1913.4275528486. The cubic root of 3661205 is about 154.1255652139.

Adding to 3661205 its reverse (5021663), we get a palindrome (8682868).

The spelling of 3661205 in words is "three million, six hundred sixty-one thousand, two hundred five".