12143872 has 72 divisors (see below), whose sum is σ = 27042120. Its totient is φ = 5406720.

The previous prime is 12143863. The next prime is 12143891. The reversal of 12143872 is 27834121.

It can be written as a sum of positive squares in 4 ways, for example, as 746496 + 11397376 = 864^2 + 3376^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12143872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136404 + ... + 136492.

It is an arithmetic number, because the mean of its divisors is an integer number (375585).

Almost surely, 2^12143872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12143872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13521060).

12143872 is an abundant number, since it is smaller than the sum of its proper divisors (14898248).

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

12143872 is an equidigital number, since it uses as much as digits as its factorization.

12143872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 145 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 12143872 is about 3484.8058769464. The cubic root of 12143872 is about 229.8541734719.

Adding to 12143872 its reverse (27834121), we get a palindrome (39977993).

The spelling of 12143872 in words is "twelve million, one hundred forty-three thousand, eight hundred seventy-two".