12002643 has 12 divisors (see below), whose sum is σ = 17475328. Its totient is φ = 7938000.

The previous prime is 12002609. The next prime is 12002647. The reversal of 12002643 is 34620021.

It is a happy number.

12002643 is a `hidden beast` number, since 1 + 20 + 0 + 2 + 643 = 666.

It is not a de Polignac number, because 12002643 - 2⁶ = 12002579 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 (12002647) 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 11 ways as a sum of consecutive naturals, for example, 4108 + ... + 6393.

Almost surely, 2^12002643 is an apocalyptic number.

12002643 is a deficient number, since it is larger than the sum of its proper divisors (5472685).

12002643 is a wasteful number, since it uses less digits than its factorization.

12002643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10634 (or 10631 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 12002643 is about 3464.4830783250. The cubic root of 12002643 is about 228.9596554976.

Adding to 12002643 its reverse (34620021), we get a palindrome (46622664).

The spelling of 12002643 in words is "twelve million, two thousand, six hundred forty-three".