12115205 has 4 divisors (see below), whose sum is σ = 14538252. Its totient is φ = 9692160.

The previous prime is 12115199. The next prime is 12115211. The reversal of 12115205 is 50251121.

12115205 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 is an interprime number because it is at equal distance from previous prime (12115199) and next prime (12115211).

It can be written as a sum of positive squares in 2 ways, for example, as 1350244 + 10764961 = 1162^2 + 3281^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12115205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211516 + ... + 1211525.

It is an arithmetic number, because the mean of its divisors is an integer number (3634563).

Almost surely, 2^12115205 is an apocalyptic number.

It is an amenable number.

12115205 is a deficient number, since it is larger than the sum of its proper divisors (2423047).

12115205 is an equidigital number, since it uses as much as digits as its factorization.

12115205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423046.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 12115205 is about 3480.6903050975. The cubic root of 12115205 is about 229.6731652707.

Adding to 12115205 its reverse (50251121), we get a palindrome (62366326).

The spelling of 12115205 in words is "twelve million, one hundred fifteen thousand, two hundred five".