12751971 has 4 divisors (see below), whose sum is σ = 17002632. Its totient is φ = 8501312.

The previous prime is 12751969. The next prime is 12751987. The reversal of 12751971 is 17915721.

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

It is a cyclic number.

It is not a de Polignac number, because 12751971 - 2¹ = 12751969 is a prime.

It is a super-2 number, since 2×12751971² = 325225528769682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12751901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125326 + ... + 2125331.

It is an arithmetic number, because the mean of its divisors is an integer number (4250658).

Almost surely, 2^12751971 is an apocalyptic number.

12751971 is a deficient number, since it is larger than the sum of its proper divisors (4250661).

12751971 is an equidigital number, since it uses as much as digits as its factorization.

12751971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250660.

The product of its digits is 4410, while the sum is 33.

The square root of 12751971 is about 3570.9901988104. The cubic root of 12751971 is about 233.6284739150.

The spelling of 12751971 in words is "twelve million, seven hundred fifty-one thousand, nine hundred seventy-one".