12664143 has 12 divisors (see below), whose sum is σ = 18427968. Its totient is φ = 8380320.

The previous prime is 12664129. The next prime is 12664147. The reversal of 12664143 is 34146621.

12664143 is a `hidden beast` number, since 12 + 6 + 641 + 4 + 3 = 666.

It is not a de Polignac number, because 12664143 - 2⁶ = 12664079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664147) 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, 3903 + ... + 6368.

It is an arithmetic number, because the mean of its divisors is an integer number (1535664).

Almost surely, 2^12664143 is an apocalyptic number.

12664143 is a deficient number, since it is larger than the sum of its proper divisors (5763825).

12664143 is a wasteful number, since it uses less digits than its factorization.

12664143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10414 (or 10411 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 12664143 is about 3558.6715217901. The cubic root of 12664143 is about 233.0908730864.

The spelling of 12664143 in words is "twelve million, six hundred sixty-four thousand, one hundred forty-three".