12012843 has 4 divisors (see below), whose sum is σ = 16017128. Its totient is φ = 8008560.

The previous prime is 12012817. The next prime is 12012851. The reversal of 12012843 is 34821021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34821021 = 3 ⋅11607007.

It is not a de Polignac number, because 12012843 - 2⁹ = 12012331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012893) 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, 2002138 + ... + 2002143.

It is an arithmetic number, because the mean of its divisors is an integer number (4004282).

Almost surely, 2^12012843 is an apocalyptic number.

12012843 is a deficient number, since it is larger than the sum of its proper divisors (4004285).

12012843 is an equidigital number, since it uses as much as digits as its factorization.

12012843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004284.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 12012843 is about 3465.9548467919. The cubic root of 12012843 is about 229.0244947515.

Adding to 12012843 its reverse (34821021), we get a palindrome (46833864).

The spelling of 12012843 in words is "twelve million, twelve thousand, eight hundred forty-three".