12871281 has 4 divisors (see below), whose sum is σ = 17161712. Its totient is φ = 8580852.

The previous prime is 12871259. The next prime is 12871291. The reversal of 12871281 is 18217821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12871281 - 2¹³ = 12863089 is a prime.

It is a super-2 number, since 2×12871281² = 331339749161922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12871241) 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 3 ways as a sum of consecutive naturals, for example, 2145211 + ... + 2145216.

It is an arithmetic number, because the mean of its divisors is an integer number (4290428).

Almost surely, 2^12871281 is an apocalyptic number.

It is an amenable number.

12871281 is a deficient number, since it is larger than the sum of its proper divisors (4290431).

12871281 is an equidigital number, since it uses as much as digits as its factorization.

12871281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290430.

The product of its digits is 1792, while the sum is 30.

The square root of 12871281 is about 3587.6567561571. The cubic root of 12871281 is about 234.3548382301.

The spelling of 12871281 in words is "twelve million, eight hundred seventy-one thousand, two hundred eighty-one".