12143238 has 16 divisors (see below), whose sum is σ = 24433920. Its totient is φ = 4023176.

The previous prime is 12143237. The next prime is 12143251. The reversal of 12143238 is 83234121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143233) by changing a digit.

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, 5058 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (1527120).

Almost surely, 2^12143238 is an apocalyptic number.

12143238 is an abundant number, since it is smaller than the sum of its proper divisors (12290682).

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

12143238 is a wasteful number, since it uses less digits than its factorization.

12143238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12291.

The product of its digits is 1152, while the sum is 24.

The square root of 12143238 is about 3484.7149094295. The cubic root of 12143238 is about 229.8501733726.

Adding to 12143238 its reverse (83234121), we get a palindrome (95377359).

The spelling of 12143238 in words is "twelve million, one hundred forty-three thousand, two hundred thirty-eight".