12971271 has 4 divisors (see below), whose sum is σ = 17295032. Its totient is φ = 8647512.

The previous prime is 12971263. The next prime is 12971279. The reversal of 12971271 is 17217921.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (12971263) and next prime (12971279).

It is not a de Polignac number, because 12971271 - 2³ = 12971263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12971279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2161876 + ... + 2161881.

It is an arithmetic number, because the mean of its divisors is an integer number (4323758).

Almost surely, 2^12971271 is an apocalyptic number.

12971271 is a deficient number, since it is larger than the sum of its proper divisors (4323761).

12971271 is an equidigital number, since it uses as much as digits as its factorization.

12971271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323760.

The product of its digits is 1764, while the sum is 30.

The square root of 12971271 is about 3601.5650764633. The cubic root of 12971271 is about 234.9601320628.

The spelling of 12971271 in words is "twelve million, nine hundred seventy-one thousand, two hundred seventy-one".