12642271 has 16 divisors (see below), whose sum is σ = 13953600. Its totient is φ = 11404800.

The previous prime is 12642263. The next prime is 12642281. The reversal of 12642271 is 17224621.

It is a cyclic number.

It is not a de Polignac number, because 12642271 - 2³ = 12642263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63430 + ... + 63628.

It is an arithmetic number, because the mean of its divisors is an integer number (872100).

Almost surely, 2^12642271 is an apocalyptic number.

12642271 is a deficient number, since it is larger than the sum of its proper divisors (1311329).

12642271 is a wasteful number, since it uses less digits than its factorization.

12642271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354.

The product of its digits is 1344, while the sum is 25.

The square root of 12642271 is about 3555.5971369096. The cubic root of 12642271 is about 232.9566068257.

Adding to 12642271 its reverse (17224621), we get a palindrome (29866892).

The spelling of 12642271 in words is "twelve million, six hundred forty-two thousand, two hundred seventy-one".