12421872 has 30 divisors (see below), whose sum is σ = 34764392. Its totient is φ = 4140576.

The previous prime is 12421861. The next prime is 12421873. The reversal of 12421872 is 27812421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421873) 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 5 ways as a sum of consecutive naturals, for example, 42988 + ... + 43275.

Almost surely, 2^12421872 is an apocalyptic number.

12421872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12421872 is an abundant number, since it is smaller than the sum of its proper divisors (22342520).

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

12421872 is a wasteful number, since it uses less digits than its factorization.

12421872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86277 (or 86268 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 12421872 is about 3524.4676193718. The cubic root of 12421872 is about 231.5949133983.

The spelling of 12421872 in words is "twelve million, four hundred twenty-one thousand, eight hundred seventy-two".