12118287 has 4 divisors (see below), whose sum is σ = 16157720. Its totient is φ = 8078856.

The previous prime is 12118279. The next prime is 12118313. The reversal of 12118287 is 78281121.

It is a happy number.

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

It is not a de Polignac number, because 12118287 - 2³ = 12118279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12118207) 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, 2019712 + ... + 2019717.

It is an arithmetic number, because the mean of its divisors is an integer number (4039430).

Almost surely, 2^12118287 is an apocalyptic number.

12118287 is a deficient number, since it is larger than the sum of its proper divisors (4039433).

12118287 is an equidigital number, since it uses as much as digits as its factorization.

12118287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039432.

The product of its digits is 1792, while the sum is 30.

The square root of 12118287 is about 3481.1330052154. The cubic root of 12118287 is about 229.6926392205.

The spelling of 12118287 in words is "twelve million, one hundred eighteen thousand, two hundred eighty-seven".