12643071 has 16 divisors (see below), whose sum is σ = 19888128. Its totient is φ = 6991200.

The previous prime is 12643049. The next prime is 12643109. The reversal of 12643071 is 17034621.

It is not a de Polignac number, because 12643071 - 2¹³ = 12634879 is a prime.

It is a super-2 number, since 2×12643071² = 319694488622082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9060 + ... + 10361.

It is an arithmetic number, because the mean of its divisors is an integer number (1243008).

Almost surely, 2^12643071 is an apocalyptic number.

12643071 is a deficient number, since it is larger than the sum of its proper divisors (7245057).

12643071 is a wasteful number, since it uses less digits than its factorization.

12643071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19462.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 12643071 is about 3555.7096338143. The cubic root of 12643071 is about 232.9615205356.

Adding to 12643071 its reverse (17034621), we get a palindrome (29677692).

The spelling of 12643071 in words is "twelve million, six hundred forty-three thousand, seventy-one".