12161205 has 64 divisors (see below), whose sum is σ = 26196480. Its totient is φ = 5225472.

The previous prime is 12161189. The next prime is 12161213. The reversal of 12161205 is 50216121.

12161205 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12161205 - 2⁴ = 12161189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15687 + ... + 16443.

It is an arithmetic number, because the mean of its divisors is an integer number (409320).

Almost surely, 2^12161205 is an apocalyptic number.

12161205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12161205 is an abundant number, since it is smaller than the sum of its proper divisors (14035275).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12161205 is a wasteful number, since it uses less digits than its factorization.

12161205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12161205 is about 3487.2919292769. The cubic root of 12161205 is about 229.9634787632.

Adding to 12161205 its reverse (50216121), we get a palindrome (62377326).

The spelling of 12161205 in words is "twelve million, one hundred sixty-one thousand, two hundred five".