12840102 has 24 divisors (see below), whose sum is σ = 30349800. Its totient is φ = 3890880.

The previous prime is 12840089. The next prime is 12840103. The reversal of 12840102 is 20104821.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32227 + ... + 32622.

It is an arithmetic number, because the mean of its divisors is an integer number (1264575).

Almost surely, 2^12840102 is an apocalyptic number.

12840102 is an abundant number, since it is smaller than the sum of its proper divisors (17509698).

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

12840102 is a wasteful number, since it uses less digits than its factorization.

12840102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64868 (or 64865 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12840102 is about 3583.3088061176. The cubic root of 12840102 is about 234.1654538816.

Adding to 12840102 its reverse (20104821), we get a palindrome (32944923).

The spelling of 12840102 in words is "twelve million, eight hundred forty thousand, one hundred two".