12720671 has 8 divisors (see below), whose sum is σ = 13444080. Its totient is φ = 12002688.

The previous prime is 12720649. The next prime is 12720707. The reversal of 12720671 is 17602721.

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 12720671 - 2¹⁰ = 12719647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12720671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720601) 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, 4055 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (1680510).

Almost surely, 2^12720671 is an apocalyptic number.

12720671 is a deficient number, since it is larger than the sum of its proper divisors (723409).

12720671 is a wasteful number, since it uses less digits than its factorization.

12720671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 12720671 is about 3566.6049683137. The cubic root of 12720671 is about 233.4371685249.

The spelling of 12720671 in words is "twelve million, seven hundred twenty thousand, six hundred seventy-one".