12143216 has 40 divisors (see below), whose sum is σ = 24467184. Its totient is φ = 5834240.

The previous prime is 12143189. The next prime is 12143221. The reversal of 12143216 is 61234121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70106 + ... + 70278.

Almost surely, 2^12143216 is an apocalyptic number.

12143216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12143216 is an abundant number, since it is smaller than the sum of its proper divisors (12323968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12143216 is a wasteful number, since it uses less digits than its factorization.

12143216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 323 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 12143216 is about 3484.7117527853. The cubic root of 12143216 is about 229.8500345654.

Adding to 12143216 its reverse (61234121), we get a palindrome (73377337).

The spelling of 12143216 in words is "twelve million, one hundred forty-three thousand, two hundred sixteen".