12345205 has 4 divisors (see below), whose sum is σ = 14814252. Its totient is φ = 9876160.

The previous prime is 12345191. The next prime is 12345209. The reversal of 12345205 is 50254321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6517809 + 5827396 = 2553^2 + 2414^2 .

It is not a de Polignac number, because 12345205 - 2⁹ = 12344693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1234516 + ... + 1234525.

It is an arithmetic number, because the mean of its divisors is an integer number (3703563).

Almost surely, 2^12345205 is an apocalyptic number.

It is an amenable number.

12345205 is a deficient number, since it is larger than the sum of its proper divisors (2469047).

12345205 is an equidigital number, since it uses as much as digits as its factorization.

12345205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469046.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 12345205 is about 3513.5743908447. The cubic root of 12345205 is about 231.1174667895.

Adding to 12345205 its reverse (50254321), we get a palindrome (62599526).

The spelling of 12345205 in words is "twelve million, three hundred forty-five thousand, two hundred five".