12143816 has 32 divisors (see below), whose sum is σ = 24537600. Its totient is φ = 5617920.

The previous prime is 12143809. The next prime is 12143843. The reversal of 12143816 is 61834121.

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

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, 4640 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (766800).

Almost surely, 2^12143816 is an apocalyptic number.

It is an amenable number.

12143816 is an abundant number, since it is smaller than the sum of its proper divisors (12393784).

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

12143816 is a wasteful number, since it uses less digits than its factorization.

12143816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2185 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 12143816 is about 3484.7978420563. The cubic root of 12143816 is about 229.8538201564.

Adding to 12143816 its reverse (61834121), we get a palindrome (73977937).

The spelling of 12143816 in words is "twelve million, one hundred forty-three thousand, eight hundred sixteen".