12143075 has 12 divisors (see below), whose sum is σ = 17208720. Its totient is φ = 8326560.

The previous prime is 12143069. The next prime is 12143077. The reversal of 12143075 is 57034121.

It is not a de Polignac number, because 12143075 - 2¹² = 12138979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12143075.

It is not an unprimeable number, because it can be changed into a prime (12143077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34520 + ... + 34869.

It is an arithmetic number, because the mean of its divisors is an integer number (1434060).

Almost surely, 2^12143075 is an apocalyptic number.

12143075 is a deficient number, since it is larger than the sum of its proper divisors (5065645).

12143075 is an equidigital number, since it uses as much as digits as its factorization.

12143075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69406 (or 69401 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12143075 is about 3484.6915214980. The cubic root of 12143075 is about 229.8491449334.

Adding to 12143075 its reverse (57034121), we get a palindrome (69177196).

The spelling of 12143075 in words is "twelve million, one hundred forty-three thousand, seventy-five".