12142321 has 8 divisors (see below), whose sum is σ = 12798144. Its totient is φ = 11497200.

The previous prime is 12142289. The next prime is 12142331. The reversal of 12142321 is 12324121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12142321 - 2⁵ = 12142289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12142295 and 12142304.

It is not an unprimeable number, because it can be changed into a prime (12142331) 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 7 ways as a sum of consecutive naturals, for example, 291 + ... + 4936.

It is an arithmetic number, because the mean of its divisors is an integer number (1599768).

Almost surely, 2^12142321 is an apocalyptic number.

It is an amenable number.

12142321 is a deficient number, since it is larger than the sum of its proper divisors (655823).

12142321 is a wasteful number, since it uses less digits than its factorization.

12142321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5351.

The product of its digits is 96, while the sum is 16.

The square root of 12142321 is about 3484.5833323369. The cubic root of 12142321 is about 229.8443874937.

Adding to 12142321 its reverse (12324121), we get a palindrome (24466442).

The spelling of 12142321 in words is "twelve million, one hundred forty-two thousand, three hundred twenty-one".