12408205 has 4 divisors (see below), whose sum is σ = 14889852. Its totient is φ = 9926560.

The previous prime is 12408203. The next prime is 12408211. The reversal of 12408205 is 50280421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50280421 = 2617 ⋅19213.

It can be written as a sum of positive squares in 2 ways, for example, as 4674244 + 7733961 = 2162^2 + 2781^2 .

It is not a de Polignac number, because 12408205 - 2¹ = 12408203 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 (12408203) 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, 1240816 + ... + 1240825.

It is an arithmetic number, because the mean of its divisors is an integer number (3722463).

Almost surely, 2^12408205 is an apocalyptic number.

It is an amenable number.

12408205 is a deficient number, since it is larger than the sum of its proper divisors (2481647).

12408205 is an equidigital number, since it uses as much as digits as its factorization.

12408205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481646.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 12408205 is about 3522.5282113845. The cubic root of 12408205 is about 231.5099458180.

Adding to 12408205 its reverse (50280421), we get a palindrome (62688626).

It can be divided in two parts, 12408 and 205, that multiplied together give a triangular number (2543640 = T₂₂₅₅).

The spelling of 12408205 in words is "twelve million, four hundred eight thousand, two hundred five".