12587171 has 4 divisors (see below), whose sum is σ = 12759672. Its totient is φ = 12414672.

The previous prime is 12587153. The next prime is 12587203. The reversal of 12587171 is 17178521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17178521 = 71 ⋅241951.

It is a de Polignac number, because none of the positive numbers 2^k-12587171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12587111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86141 + ... + 86286.

It is an arithmetic number, because the mean of its divisors is an integer number (3189918).

Almost surely, 2^12587171 is an apocalyptic number.

12587171 is a deficient number, since it is larger than the sum of its proper divisors (172501).

12587171 is an equidigital number, since it uses as much as digits as its factorization.

12587171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172500.

The product of its digits is 3920, while the sum is 32.

The square root of 12587171 is about 3547.8403289889. The cubic root of 12587171 is about 232.6176750440.

The spelling of 12587171 in words is "twelve million, five hundred eighty-seven thousand, one hundred seventy-one".