12651271 has 4 divisors (see below), whose sum is σ = 12661432. Its totient is φ = 12641112.

The previous prime is 12651257. The next prime is 12651293. The reversal of 12651271 is 17215621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17215621 = 881 ⋅19541.

It is a cyclic number.

It is not a de Polignac number, because 12651271 - 2¹¹ = 12649223 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 (12651251) 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, 2901 + ... + 5806.

It is an arithmetic number, because the mean of its divisors is an integer number (3165358).

Almost surely, 2^12651271 is an apocalyptic number.

12651271 is a deficient number, since it is larger than the sum of its proper divisors (10161).

12651271 is an equidigital number, since it uses as much as digits as its factorization.

12651271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160.

The product of its digits is 840, while the sum is 25.

The square root of 12651271 is about 3556.8625219426. The cubic root of 12651271 is about 233.0118741147.

Adding to 12651271 its reverse (17215621), we get a palindrome (29866892).

The spelling of 12651271 in words is "twelve million, six hundred fifty-one thousand, two hundred seventy-one".