12143422 has 4 divisors (see below), whose sum is σ = 18215136. Its totient is φ = 6071710.

The previous prime is 12143407. The next prime is 12143429. The reversal of 12143422 is 22434121.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12143422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3035854 + ... + 3035857.

It is an arithmetic number, because the mean of its divisors is an integer number (4553784).

Almost surely, 2^12143422 is an apocalyptic number.

12143422 is a deficient number, since it is larger than the sum of its proper divisors (6071714).

12143422 is an equidigital number, since it uses as much as digits as its factorization.

12143422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071713.

The product of its digits is 384, while the sum is 19.

The square root of 12143422 is about 3484.7413103414. The cubic root of 12143422 is about 229.8513342990.

Adding to 12143422 its reverse (22434121), we get a palindrome (34577543).

The spelling of 12143422 in words is "twelve million, one hundred forty-three thousand, four hundred twenty-two".