12981232 has 20 divisors (see below), whose sum is σ = 27437976. Its totient is φ = 5900480.

The previous prime is 12981211. The next prime is 12981233. The reversal of 12981232 is 23218921.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12981232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36703 + ... + 37054.

Almost surely, 2^12981232 is an apocalyptic number.

It is an amenable number.

12981232 is an abundant number, since it is smaller than the sum of its proper divisors (14456744).

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

12981232 is a wasteful number, since it uses less digits than its factorization.

12981232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73776 (or 73770 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 12981232 is about 3602.9476821070. The cubic root of 12981232 is about 235.0202608154.

The spelling of 12981232 in words is "twelve million, nine hundred eighty-one thousand, two hundred thirty-two".