12421343 has 4 divisors (see below), whose sum is σ = 13550568. Its totient is φ = 11292120.

The previous prime is 12421333. The next prime is 12421349. The reversal of 12421343 is 34312421.

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

It is a cyclic number.

It is not a de Polignac number, because 12421343 - 2⁴ = 12421327 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 (12421349) 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, 564596 + ... + 564617.

It is an arithmetic number, because the mean of its divisors is an integer number (3387642).

Almost surely, 2^12421343 is an apocalyptic number.

12421343 is a deficient number, since it is larger than the sum of its proper divisors (1129225).

12421343 is a wasteful number, since it uses less digits than its factorization.

12421343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129224.

The product of its digits is 576, while the sum is 20.

The square root of 12421343 is about 3524.3925717774. The cubic root of 12421343 is about 231.5916257712.

Adding to 12421343 its reverse (34312421), we get a palindrome (46733764).

The spelling of 12421343 in words is "twelve million, four hundred twenty-one thousand, three hundred forty-three".