12871491 has 16 divisors (see below), whose sum is σ = 17736576. Its totient is φ = 8297856.

The previous prime is 12871489. The next prime is 12871501. The reversal of 12871491 is 19417821.

It is not a de Polignac number, because 12871491 - 2¹ = 12871489 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (12871451) 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 15 ways as a sum of consecutive naturals, for example, 14136 + ... + 15018.

It is an arithmetic number, because the mean of its divisors is an integer number (1108536).

Almost surely, 2^12871491 is an apocalyptic number.

12871491 is a deficient number, since it is larger than the sum of its proper divisors (4865085).

12871491 is a wasteful number, since it uses less digits than its factorization.

12871491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042.

The product of its digits is 4032, while the sum is 33.

The square root of 12871491 is about 3587.6860230516. The cubic root of 12871491 is about 234.3561127536.

The spelling of 12871491 in words is "twelve million, eight hundred seventy-one thousand, four hundred ninety-one".