12412421 has 4 divisors (see below), whose sum is σ = 14185632. Its totient is φ = 10639212.

The previous prime is 12412399. The next prime is 12412447. The reversal of 12412421 is 12421421.

12412421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12412421 - 2⁶ = 12412357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12412421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12412451) 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, 886595 + ... + 886608.

It is an arithmetic number, because the mean of its divisors is an integer number (3546408).

Almost surely, 2^12412421 is an apocalyptic number.

It is an amenable number.

12412421 is a deficient number, since it is larger than the sum of its proper divisors (1773211).

12412421 is an equidigital number, since it uses as much as digits as its factorization.

12412421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773210.

The product of its digits is 128, while the sum is 17.

The square root of 12412421 is about 3523.1265943761. The cubic root of 12412421 is about 231.5361632929.

Adding to 12412421 its reverse (12421421), we get a palindrome (24833842).

The spelling of 12412421 in words is "twelve million, four hundred twelve thousand, four hundred twenty-one".