12143867 has 4 divisors (see below), whose sum is σ = 12239616. Its totient is φ = 12048120.

The previous prime is 12143863. The next prime is 12143891. The reversal of 12143867 is 76834121.

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

It is a cyclic number.

It is not a de Polignac number, because 12143867 - 2² = 12143863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12143863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47684 + ... + 47937.

It is an arithmetic number, because the mean of its divisors is an integer number (3059904).

Almost surely, 2^12143867 is an apocalyptic number.

12143867 is a deficient number, since it is larger than the sum of its proper divisors (95749).

12143867 is an equidigital number, since it uses as much as digits as its factorization.

12143867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95748.

The product of its digits is 8064, while the sum is 32.

The square root of 12143867 is about 3484.8051595462. The cubic root of 12143867 is about 229.8541419259.

Adding to 12143867 its reverse (76834121), we get a palindrome (88977988).

The spelling of 12143867 in words is "twelve million, one hundred forty-three thousand, eight hundred sixty-seven".