12421647 has 48 divisors (see below), whose sum is σ = 22024800. Its totient is φ = 6894720.

The previous prime is 12421639. The next prime is 12421681. The reversal of 12421647 is 74612421.

12421647 is a `hidden beast` number, since 12 + 4 + 2 + 1 + 647 = 666.

It is not a de Polignac number, because 12421647 - 2³ = 12421639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12421647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421637) 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 47 ways as a sum of consecutive naturals, for example, 54129 + ... + 54357.

It is an arithmetic number, because the mean of its divisors is an integer number (458850).

Almost surely, 2^12421647 is an apocalyptic number.

12421647 is a deficient number, since it is larger than the sum of its proper divisors (9603153).

12421647 is a wasteful number, since it uses less digits than its factorization.

12421647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 280 counting only the distinct ones).

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

The square root of 12421647 is about 3524.4356995128. The cubic root of 12421647 is about 231.5935150806.

The spelling of 12421647 in words is "twelve million, four hundred twenty-one thousand, six hundred forty-seven".