12281143 has 8 divisors (see below), whose sum is σ = 14061440. Its totient is φ = 10507320.

The previous prime is 12281141. The next prime is 12281161. The reversal of 12281143 is 34118221.

It is a happy number.

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 12281143 - 2¹ = 12281141 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281141) 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, 3568 + ... + 6106.

It is an arithmetic number, because the mean of its divisors is an integer number (1757680).

Almost surely, 2^12281143 is an apocalyptic number.

12281143 is a deficient number, since it is larger than the sum of its proper divisors (1780297).

12281143 is an equidigital number, since it uses as much as digits as its factorization.

12281143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237.

The product of its digits is 384, while the sum is 22.

The square root of 12281143 is about 3504.4461759314. The cubic root of 12281143 is about 230.7170000625.

Adding to 12281143 its reverse (34118221), we get a palindrome (46399364).

The spelling of 12281143 in words is "twelve million, two hundred eighty-one thousand, one hundred forty-three".