12081432 has 32 divisors (see below), whose sum is σ = 32950080. Its totient is φ = 3660960.

The previous prime is 12081401. The next prime is 12081439. The reversal of 12081432 is 23418021.

It is a junction number, because it is equal to n+sod(n) for n = 12081399 and 12081408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12081439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22618 + ... + 23145.

It is an arithmetic number, because the mean of its divisors is an integer number (1029690).

Almost surely, 2^12081432 is an apocalyptic number.

12081432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12081432 is an abundant number, since it is smaller than the sum of its proper divisors (20868648).

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

12081432 is a wasteful number, since it uses less digits than its factorization.

12081432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45783 (or 45779 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 12081432 is about 3475.8354391427. The cubic root of 12081432 is about 229.4595502113.

Adding to 12081432 its reverse (23418021), we get a palindrome (35499453).

The spelling of 12081432 in words is "twelve million, eighty-one thousand, four hundred thirty-two".