3161205 has 12 divisors (see below), whose sum is σ = 5479500. Its totient is φ = 1685952.

The previous prime is 3161183. The next prime is 3161209. The reversal of 3161205 is 5021613.

3161205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 527076 + 2634129 = 726^2 + 1623^2 .

It is not a de Polignac number, because 3161205 - 2¹¹ = 3159157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3161209) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 35080 + ... + 35169.

It is an arithmetic number, because the mean of its divisors is an integer number (456625).

Almost surely, 2^3161205 is an apocalyptic number.

It is an amenable number.

3161205 is a deficient number, since it is larger than the sum of its proper divisors (2318295).

3161205 is a wasteful number, since it uses less digits than its factorization.

3161205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70260 (or 70257 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 3161205 is about 1777.9777838882. The cubic root of 3161205 is about 146.7633287272.

Adding to 3161205 its reverse (5021613), we get a palindrome (8182818).

It can be divided in two parts, 316 and 1205, that added together give a square (1521 = 39²).

The spelling of 3161205 in words is "three million, one hundred sixty-one thousand, two hundred five".