12871445 has 4 divisors (see below), whose sum is σ = 15445740. Its totient is φ = 10297152.

The previous prime is 12871429. The next prime is 12871451. The reversal of 12871445 is 54417821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3587236 + 9284209 = 1894^2 + 3047^2 .

It is a cyclic number.

It is not a de Polignac number, because 12871445 - 2⁴ = 12871429 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1287140 + ... + 1287149.

It is an arithmetic number, because the mean of its divisors is an integer number (3861435).

Almost surely, 2^12871445 is an apocalyptic number.

It is an amenable number.

12871445 is a deficient number, since it is larger than the sum of its proper divisors (2574295).

12871445 is an equidigital number, since it uses as much as digits as its factorization.

12871445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574294.

The product of its digits is 8960, while the sum is 32.

The square root of 12871445 is about 3587.6796122285. The cubic root of 12871445 is about 234.3558335734.

The spelling of 12871445 in words is "twelve million, eight hundred seventy-one thousand, four hundred forty-five".