12642471 has 12 divisors (see below), whose sum is σ = 18330000. Its totient is φ = 8396640.

The previous prime is 12642457. The next prime is 12642491. The reversal of 12642471 is 17424621.

12642471 is a `hidden beast` number, since 12 + 642 + 4 + 7 + 1 = 666.

It is not a de Polignac number, because 12642471 - 2¹⁷ = 12511399 is a prime.

It is a super-3 number, since 3×12642471³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642491) 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 11 ways as a sum of consecutive naturals, for example, 30 + ... + 5028.

It is an arithmetic number, because the mean of its divisors is an integer number (1527500).

Almost surely, 2^12642471 is an apocalyptic number.

12642471 is a deficient number, since it is larger than the sum of its proper divisors (5687529).

12642471 is a wasteful number, since it uses less digits than its factorization.

12642471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286 (or 5283 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 12642471 is about 3555.6252614695. The cubic root of 12642471 is about 232.9578352726.

The spelling of 12642471 in words is "twelve million, six hundred forty-two thousand, four hundred seventy-one".