12468421 has 4 divisors (see below), whose sum is σ = 14249632. Its totient is φ = 10687212.

The previous prime is 12468403. The next prime is 12468431. The reversal of 12468421 is 12486421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12486421 = 433 ⋅28837.

It is a cyclic number.

It is not a de Polignac number, because 12468421 - 2¹³ = 12460229 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 12468421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12468431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890595 + ... + 890608.

It is an arithmetic number, because the mean of its divisors is an integer number (3562408).

Almost surely, 2^12468421 is an apocalyptic number.

It is an amenable number.

12468421 is a deficient number, since it is larger than the sum of its proper divisors (1781211).

12468421 is an equidigital number, since it uses as much as digits as its factorization.

12468421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781210.

The product of its digits is 3072, while the sum is 28.

The square root of 12468421 is about 3531.0651367541. The cubic root of 12468421 is about 231.8838412266.

The spelling of 12468421 in words is "twelve million, four hundred sixty-eight thousand, four hundred twenty-one".