12843140 has 12 divisors (see below), whose sum is σ = 26970636. Its totient is φ = 5137248.

The previous prime is 12843137. The next prime is 12843151. The reversal of 12843140 is 4134821.

It can be written as a sum of positive squares in 2 ways, for example, as 1459264 + 11383876 = 1208^2 + 3374^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321059 + ... + 321098.

It is an arithmetic number, because the mean of its divisors is an integer number (2247553).

Almost surely, 2^12843140 is an apocalyptic number.

12843140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12843140 is an abundant number, since it is smaller than the sum of its proper divisors (14127496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12843140 is a wasteful number, since it uses less digits than its factorization.

12843140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642166 (or 642164 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 12843140 is about 3583.7326909244. The cubic root of 12843140 is about 234.1839204678.

Adding to 12843140 its reverse (4134821), we get a palindrome (16977961).

The spelling of 12843140 in words is "twelve million, eight hundred forty-three thousand, one hundred forty".