12321158 has 16 divisors (see below), whose sum is σ = 20599920. Its totient is φ = 5492736.

The previous prime is 12321151. The next prime is 12321161. The reversal of 12321158 is 85112321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8891 + ... + 10182.

It is an arithmetic number, because the mean of its divisors is an integer number (1287495).

Almost surely, 2^12321158 is an apocalyptic number.

12321158 is a deficient number, since it is larger than the sum of its proper divisors (8278762).

12321158 is a wasteful number, since it uses less digits than its factorization.

12321158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19111.

The product of its digits is 480, while the sum is 23.

The square root of 12321158 is about 3510.1507090152. The cubic root of 12321158 is about 230.9673060805.

Adding to 12321158 its reverse (85112321), we get a palindrome (97433479).

The spelling of 12321158 in words is "twelve million, three hundred twenty-one thousand, one hundred fifty-eight".