12242143 has 4 divisors (see below), whose sum is σ = 12526888. Its totient is φ = 11957400.

The previous prime is 12242123. The next prime is 12242161. The reversal of 12242143 is 34124221.

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-12242143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12242143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12242123) 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, 142308 + ... + 142393.

It is an arithmetic number, because the mean of its divisors is an integer number (3131722).

Almost surely, 2^12242143 is an apocalyptic number.

12242143 is a deficient number, since it is larger than the sum of its proper divisors (284745).

12242143 is an equidigital number, since it uses as much as digits as its factorization.

12242143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284744.

The product of its digits is 384, while the sum is 19.

The square root of 12242143 is about 3498.8773913928. The cubic root of 12242143 is about 230.4725194393.

Adding to 12242143 its reverse (34124221), we get a palindrome (46366364).

The spelling of 12242143 in words is "twelve million, two hundred forty-two thousand, one hundred forty-three".