12421436 has 12 divisors (see below), whose sum is σ = 21816312. Its totient is φ = 6188208.

The previous prime is 12421433. The next prime is 12421439. The reversal of 12421436 is 63412421.

It is an interprime number because it is at equal distance from previous prime (12421433) and next prime (12421439).

It is a congruent number.

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, 4355 + ... + 6618.

It is an arithmetic number, because the mean of its divisors is an integer number (1818026).

Almost surely, 2^12421436 is an apocalyptic number.

It is an amenable number.

12421436 is a deficient number, since it is larger than the sum of its proper divisors (9394876).

12421436 is a wasteful number, since it uses less digits than its factorization.

12421436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11260 (or 11258 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 12421436 is about 3524.4057655157. The cubic root of 12421436 is about 231.5922037540.

Adding to 12421436 its reverse (63412421), we get a palindrome (75833857).

The spelling of 12421436 in words is "twelve million, four hundred twenty-one thousand, four hundred thirty-six".