12112640 has 36 divisors (see below), whose sum is σ = 29016624. Its totient is φ = 4844544.

The previous prime is 12112637. The next prime is 12112649. The reversal of 12112640 is 4621121.

It is not an unprimeable number, because it can be changed into a prime (12112649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3452 + ... + 6011.

Almost surely, 2^12112640 is an apocalyptic number.

12112640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112640 is an abundant number, since it is smaller than the sum of its proper divisors (16903984).

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

12112640 is an frugal number, since it uses more digits than its factorization.

12112640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9484 (or 9470 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 12112640 is about 3480.3218241996. The cubic root of 12112640 is about 229.6569555230.

Adding to 12112640 its reverse (4621121), we get a palindrome (16733761).

The spelling of 12112640 in words is "twelve million, one hundred twelve thousand, six hundred forty".