12885920 has 24 divisors (see below), whose sum is σ = 30443364. Its totient is φ = 5154304.

The previous prime is 12885913. The next prime is 12885923. The reversal of 12885920 is 2958821.

It can be written as a sum of positive squares in 2 ways, for example, as 12759184 + 126736 = 3572^2 + 356^2 .

It is not an unprimeable number, because it can be changed into a prime (12885923) 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, 40109 + ... + 40428.

Almost surely, 2^12885920 is an apocalyptic number.

12885920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12885920 is an abundant number, since it is smaller than the sum of its proper divisors (17557444).

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

12885920 is an equidigital number, since it uses as much as digits as its factorization.

12885920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80552 (or 80544 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 12885920 is about 3589.6963659897. The cubic root of 12885920 is about 234.4436514743.

The spelling of 12885920 in words is "twelve million, eight hundred eighty-five thousand, nine hundred twenty".