12081424 has 20 divisors (see below), whose sum is σ = 24785244. Its totient is φ = 5685248.

The previous prime is 12081401. The next prime is 12081439. The reversal of 12081424 is 42418021.

It can be written as a sum of positive squares in 2 ways, for example, as 4129024 + 7952400 = 2032^2 + 2820^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12081395 and 12081404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21937 + ... + 22480.

Almost surely, 2^12081424 is an apocalyptic number.

It is an amenable number.

12081424 is an abundant number, since it is smaller than the sum of its proper divisors (12703820).

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

12081424 is a wasteful number, since it uses less digits than its factorization.

12081424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44442 (or 44436 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 12081424 is about 3475.8342883400. The cubic root of 12081424 is about 229.4594995640.

Adding to 12081424 its reverse (42418021), we get a palindrome (54499445).

The spelling of 12081424 in words is "twelve million, eighty-one thousand, four hundred twenty-four".