12871647 has 6 divisors (see below), whose sum is σ = 18592392. Its totient is φ = 8581092.

The previous prime is 12871643. The next prime is 12871657. The reversal of 12871647 is 74617821.

12871647 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 1 + 647 = 666.

It is not a de Polignac number, because 12871647 - 2² = 12871643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12871643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715083 + ... + 715100.

It is an arithmetic number, because the mean of its divisors is an integer number (3098732).

Almost surely, 2^12871647 is an apocalyptic number.

12871647 is a deficient number, since it is larger than the sum of its proper divisors (5720745).

12871647 is a wasteful number, since it uses less digits than its factorization.

12871647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430189 (or 1430186 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 12871647 is about 3587.7077640187. The cubic root of 12871647 is about 234.3570595334.

The spelling of 12871647 in words is "twelve million, eight hundred seventy-one thousand, six hundred forty-seven".