12112643 has 4 divisors (see below), whose sum is σ = 12127920. Its totient is φ = 12097368.

The previous prime is 12112637. The next prime is 12112649. The reversal of 12112643 is 34621121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12112637) and next prime (12112649).

It is a cyclic number.

It is not a de Polignac number, because 12112643 - 2¹⁶ = 12047107 is a prime.

It is a super-2 number, since 2×12112643² = 293432240890898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112649) 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, 6380 + ... + 8057.

It is an arithmetic number, because the mean of its divisors is an integer number (3031980).

Almost surely, 2^12112643 is an apocalyptic number.

12112643 is a deficient number, since it is larger than the sum of its proper divisors (15277).

12112643 is an equidigital number, since it uses as much as digits as its factorization.

12112643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15276.

The product of its digits is 288, while the sum is 20.

The square root of 12112643 is about 3480.3222551942. The cubic root of 12112643 is about 229.6569744831.

Adding to 12112643 its reverse (34621121), we get a palindrome (46733764).

The spelling of 12112643 in words is "twelve million, one hundred twelve thousand, six hundred forty-three".