12143999 has 8 divisors (see below), whose sum is σ = 13926528. Its totient is φ = 10373400.

The previous prime is 12143993. The next prime is 12144007. The reversal of 12143999 is 99934121.

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

It is a cyclic number.

It is not a de Polignac number, because 12143999 - 2⁸ = 12143743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677 + ... + 4974.

It is an arithmetic number, because the mean of its divisors is an integer number (1740816).

Almost surely, 2^12143999 is an apocalyptic number.

12143999 is a deficient number, since it is larger than the sum of its proper divisors (1782529).

12143999 is an equidigital number, since it uses as much as digits as its factorization.

12143999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965.

The product of its digits is 17496, while the sum is 38.

The square root of 12143999 is about 3484.8240988607. The cubic root of 12143999 is about 229.8549747369.

The spelling of 12143999 in words is "twelve million, one hundred forty-three thousand, nine hundred ninety-nine".