12840971 has 8 divisors (see below), whose sum is σ = 15086064. Its totient is φ = 10775520.

The previous prime is 12840953. The next prime is 12841007. The reversal of 12840971 is 17904821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12840971 - 2²² = 8646667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12840911) 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 7 ways as a sum of consecutive naturals, for example, 44756 + ... + 45041.

It is an arithmetic number, because the mean of its divisors is an integer number (1885758).

Almost surely, 2^12840971 is an apocalyptic number.

12840971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12840971 is a deficient number, since it is larger than the sum of its proper divisors (2245093).

12840971 is a wasteful number, since it uses less digits than its factorization.

12840971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89821.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 12840971 is about 3583.4300607100. The cubic root of 12840971 is about 234.1707364251.

The spelling of 12840971 in words is "twelve million, eight hundred forty thousand, nine hundred seventy-one".