12143146 has 8 divisors (see below), whose sum is σ = 18232704. Its totient is φ = 6065580.

The previous prime is 12143143. The next prime is 12143161. The reversal of 12143146 is 64134121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12143143) 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 3 ways as a sum of consecutive naturals, for example, 231 + ... + 4933.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^12143146 is an apocalyptic number.

12143146 is a deficient number, since it is larger than the sum of its proper divisors (6089558).

12143146 is a wasteful number, since it uses less digits than its factorization.

12143146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5996.

The product of its digits is 576, while the sum is 22.

The square root of 12143146 is about 3484.7017088985. The cubic root of 12143146 is about 229.8495929050.

Adding to 12143146 its reverse (64134121), we get a palindrome (76277267).

The spelling of 12143146 in words is "twelve million, one hundred forty-three thousand, one hundred forty-six".