12421205 has 4 divisors (see below), whose sum is σ = 14905452. Its totient is φ = 9936960.

The previous prime is 12421187. The next prime is 12421217. The reversal of 12421205 is 50212421.

12421205 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 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 2033476 + 10387729 = 1426^2 + 3223^2 .

It is not a de Polignac number, because 12421205 - 2¹⁸ = 12159061 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a zygodrome in base 15.

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, 1242116 + ... + 1242125.

It is an arithmetic number, because the mean of its divisors is an integer number (3726363).

Almost surely, 2^12421205 is an apocalyptic number.

It is an amenable number.

12421205 is a deficient number, since it is larger than the sum of its proper divisors (2484247).

12421205 is an equidigital number, since it uses as much as digits as its factorization.

12421205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484246.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12421205 is about 3524.3729938813. The cubic root of 12421205 is about 231.5907681140.

Adding to 12421205 its reverse (50212421), we get a palindrome (62633626).

The spelling of 12421205 in words is "twelve million, four hundred twenty-one thousand, two hundred five".