12840002 has 16 divisors (see below), whose sum is σ = 22057920. Its totient is φ = 5491248.

The previous prime is 12840001. The next prime is 12840007. The reversal of 12840002 is 20004821.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (12840001) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11024 + ... + 12132.

It is an arithmetic number, because the mean of its divisors is an integer number (1378620).

Almost surely, 2^12840002 is an apocalyptic number.

12840002 is a deficient number, since it is larger than the sum of its proper divisors (9217918).

12840002 is a wasteful number, since it uses less digits than its factorization.

12840002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 12840002 is about 3583.2948525066. The cubic root of 12840002 is about 234.1648459787.

Adding to 12840002 its reverse (20004821), we get a palindrome (32844823).

The spelling of 12840002 in words is "twelve million, eight hundred forty thousand, two".