12421434 has 8 divisors (see below), whose sum is σ = 24842880. Its totient is φ = 4140476.

The previous prime is 12421433. The next prime is 12421439. The reversal of 12421434 is 43412421.

It is a sphenic number, since it is the product of 3 distinct primes.

12421434 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 12421434.

It is not an unprimeable number, because it can be changed into a prime (12421433) 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 3 ways as a sum of consecutive naturals, for example, 1035114 + ... + 1035125.

It is an arithmetic number, because the mean of its divisors is an integer number (3105360).

Almost surely, 2^12421434 is an apocalyptic number.

12421434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12421434 is a wasteful number, since it uses less digits than its factorization.

12421434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070244.

The product of its digits is 768, while the sum is 21.

The square root of 12421434 is about 3524.4054817799. The cubic root of 12421434 is about 231.5921913243.

Adding to 12421434 its reverse (43412421), we get a palindrome (55833855).

The spelling of 12421434 in words is "twelve million, four hundred twenty-one thousand, four hundred thirty-four".