12643116 has 12 divisors (see below), whose sum is σ = 29500632. Its totient is φ = 4214368.

The previous prime is 12643109. The next prime is 12643117. The reversal of 12643116 is 61134621.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12643117) 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 3 ways as a sum of consecutive naturals, for example, 526785 + ... + 526808.

It is an arithmetic number, because the mean of its divisors is an integer number (2458386).

Almost surely, 2^12643116 is an apocalyptic number.

It is an amenable number.

12643116 is an abundant number, since it is smaller than the sum of its proper divisors (16857516).

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

12643116 is a wasteful number, since it uses less digits than its factorization.

12643116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053600 (or 1053598 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 12643116 is about 3555.7159616595. The cubic root of 12643116 is about 232.9617969256.

Adding to 12643116 its reverse (61134621), we get a palindrome (73777737).

The spelling of 12643116 in words is "twelve million, six hundred forty-three thousand, one hundred sixteen".