12811232 has 24 divisors (see below), whose sum is σ = 28825776. Its totient is φ = 5490432.

The previous prime is 12811231. The next prime is 12811237. The reversal of 12811232 is 23211821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12811231) 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 3 ways as a sum of consecutive naturals, for example, 28373 + ... + 28820.

It is an arithmetic number, because the mean of its divisors is an integer number (1201074).

Almost surely, 2^12811232 is an apocalyptic number.

It is an amenable number.

12811232 is an abundant number, since it is smaller than the sum of its proper divisors (16014544).

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

12811232 is an equidigital number, since it uses as much as digits as its factorization.

12811232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57210 (or 57202 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 12811232 is about 3579.2781395136. The cubic root of 12811232 is about 233.9898210684.

The spelling of 12811232 in words is "twelve million, eight hundred eleven thousand, two hundred thirty-two".