12421207 has 6 divisors (see below), whose sum is σ = 12693368. Its totient is φ = 12154764.

The previous prime is 12421187. The next prime is 12421217. The reversal of 12421207 is 70212421.

It is a happy number.

It is not a de Polignac number, because 12421207 - 2¹⁹ = 11896919 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421217) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 603 + ... + 5020.

Almost surely, 2^12421207 is an apocalyptic number.

12421207 is a deficient number, since it is larger than the sum of its proper divisors (272161).

12421207 is an frugal number, since it uses more digits than its factorization.

12421207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717 (or 5670 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12421207 is about 3524.3732776197. The cubic root of 12421207 is about 231.5907805438.

Adding to 12421207 its reverse (70212421), we get a palindrome (82633628).

The spelling of 12421207 in words is "twelve million, four hundred twenty-one thousand, two hundred seven".