12871645 has 16 divisors (see below), whose sum is σ = 16381440. Its totient is φ = 9681984.

The previous prime is 12871643. The next prime is 12871657. The reversal of 12871645 is 54617821.

It is a cyclic number.

It is not a de Polignac number, because 12871645 - 2¹ = 12871643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12871645.

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 15 ways as a sum of consecutive naturals, for example, 14484 + ... + 15346.

It is an arithmetic number, because the mean of its divisors is an integer number (1023840).

Almost surely, 2^12871645 is an apocalyptic number.

It is an amenable number.

12871645 is a deficient number, since it is larger than the sum of its proper divisors (3509795).

12871645 is a wasteful number, since it uses less digits than its factorization.

12871645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044.

The product of its digits is 13440, while the sum is 34.

The square root of 12871645 is about 3587.7074852892. The cubic root of 12871645 is about 234.3570473953.

The spelling of 12871645 in words is "twelve million, eight hundred seventy-one thousand, six hundred forty-five".