12642004 has 12 divisors (see below), whose sum is σ = 22153684. Its totient is φ = 6312384.

The previous prime is 12642001. The next prime is 12642031. The reversal of 12642004 is 40024621.

It can be written as a sum of positive squares in 2 ways, for example, as 7128900 + 5513104 = 2670^2 + 2348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642001) 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 3 ways as a sum of consecutive naturals, for example, 2062 + ... + 5434.

Almost surely, 2^12642004 is an apocalyptic number.

It is an amenable number.

12642004 is a deficient number, since it is larger than the sum of its proper divisors (9511680).

12642004 is a wasteful number, since it uses less digits than its factorization.

12642004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4314 (or 4312 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 12642004 is about 3555.5595902755. The cubic root of 12642004 is about 232.9549668289.

Adding to 12642004 its reverse (40024621), we get a palindrome (52666625).

The spelling of 12642004 in words is "twelve million, six hundred forty-two thousand, four".