12031243 has 4 divisors (see below), whose sum is σ = 13750000. Its totient is φ = 10312488.

The previous prime is 12031219. The next prime is 12031247. The reversal of 12031243 is 34213021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34213021 = 233 ⋅146837.

It is a cyclic number.

It is not a de Polignac number, because 12031243 - 2⁵ = 12031211 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (12031247) 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, 859368 + ... + 859381.

It is an arithmetic number, because the mean of its divisors is an integer number (3437500).

Almost surely, 2^12031243 is an apocalyptic number.

12031243 is a deficient number, since it is larger than the sum of its proper divisors (1718757).

12031243 is an equidigital number, since it uses as much as digits as its factorization.

12031243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718756.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 12031243 is about 3468.6082223278. The cubic root of 12031243 is about 229.1413669187.

Adding to 12031243 its reverse (34213021), we get a palindrome (46244264).

The spelling of 12031243 in words is "twelve million, thirty-one thousand, two hundred forty-three".