12381732 has 36 divisors (see below), whose sum is σ = 34144656. Its totient is φ = 3751920.

The previous prime is 12381731. The next prime is 12381757. The reversal of 12381732 is 23718321.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 12381696 and 12381705.

It is not an unprimeable number, because it can be changed into a prime (12381731) 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 11 ways as a sum of consecutive naturals, for example, 15238 + ... + 16029.

Almost surely, 2^12381732 is an apocalyptic number.

12381732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12381732 is an abundant number, since it is smaller than the sum of its proper divisors (21762924).

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

12381732 is a wasteful number, since it uses less digits than its factorization.

12381732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31288 (or 31283 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12381732 is about 3518.7685345871. The cubic root of 12381732 is about 231.3451858452.

The spelling of 12381732 in words is "twelve million, three hundred eighty-one thousand, seven hundred thirty-two".