12643902 has 12 divisors (see below), whose sum is σ = 27395160. Its totient is φ = 4214628.

The previous prime is 12643901. The next prime is 12643907. The reversal of 12643902 is 20934621.

12643902 is a `hidden beast` number, since 12 + 643 + 9 + 0 + 2 = 666.

12643902 is a modest number, since divided by 43902 gives 126 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643901) 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 5 ways as a sum of consecutive naturals, for example, 351202 + ... + 351237.

It is an arithmetic number, because the mean of its divisors is an integer number (2282930).

Almost surely, 2^12643902 is an apocalyptic number.

12643902 is an abundant number, since it is smaller than the sum of its proper divisors (14751258).

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

12643902 is a wasteful number, since it uses less digits than its factorization.

12643902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702447 (or 702444 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 12643902 is about 3555.8264862054. The cubic root of 12643902 is about 232.9666244322.

The spelling of 12643902 in words is "twelve million, six hundred forty-three thousand, nine hundred two".