12205505 has 16 divisors (see below), whose sum is σ = 16605120. Its totient is φ = 8538048.

The previous prime is 12205483. The next prime is 12205511. The reversal of 12205505 is 50550221.

It is a cyclic number.

It is not a de Polignac number, because 12205505 - 2⁶ = 12205441 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3707 + ... + 6176.

It is an arithmetic number, because the mean of its divisors is an integer number (1037820).

Almost surely, 2^12205505 is an apocalyptic number.

It is an amenable number.

12205505 is a deficient number, since it is larger than the sum of its proper divisors (4399615).

12205505 is a wasteful number, since it uses less digits than its factorization.

12205505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9920.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 12205505 is about 3493.6377888957. The cubic root of 12205505 is about 230.2423720998.

Adding to 12205505 its reverse (50550221), we get a palindrome (62755726).

The spelling of 12205505 in words is "twelve million, two hundred five thousand, five hundred five".