12421043 has 4 divisors (see below), whose sum is σ = 12465528. Its totient is φ = 12376560.

The previous prime is 12421039. The next prime is 12421051. The reversal of 12421043 is 34012421.

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 12421043 - 2² = 12421039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421243) 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, 21821 + ... + 22382.

It is an arithmetic number, because the mean of its divisors is an integer number (3116382).

Almost surely, 2^12421043 is an apocalyptic number.

12421043 is a deficient number, since it is larger than the sum of its proper divisors (44485).

12421043 is an equidigital number, since it uses as much as digits as its factorization.

12421043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44484.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 12421043 is about 3524.3500109949. The cubic root of 12421043 is about 231.5897612909.

Adding to 12421043 its reverse (34012421), we get a palindrome (46433464).

The spelling of 12421043 in words is "twelve million, four hundred twenty-one thousand, forty-three".