12002143 has 4 divisors (see below), whose sum is σ = 12416040. Its totient is φ = 11588248.

The previous prime is 12002093. The next prime is 12002147. The reversal of 12002143 is 34120021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12002143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002147) 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, 206905 + ... + 206962.

It is an arithmetic number, because the mean of its divisors is an integer number (3104010).

Almost surely, 2^12002143 is an apocalyptic number.

12002143 is a deficient number, since it is larger than the sum of its proper divisors (413897).

12002143 is an equidigital number, since it uses as much as digits as its factorization.

12002143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413896.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12002143 is about 3464.4109167361. The cubic root of 12002143 is about 228.9564761585.

Adding to 12002143 its reverse (34120021), we get a palindrome (46122164).

The spelling of 12002143 in words is "twelve million, two thousand, one hundred forty-three".