12642738 has 16 divisors (see below), whose sum is σ = 25700736. Its totient is φ = 4145040.

The previous prime is 12642703. The next prime is 12642743. The reversal of 12642738 is 83724621.

It is a junction number, because it is equal to n+sod(n) for n = 12642699 and 12642708.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16906 + ... + 17637.

It is an arithmetic number, because the mean of its divisors is an integer number (1606296).

Almost surely, 2^12642738 is an apocalyptic number.

12642738 is an abundant number, since it is smaller than the sum of its proper divisors (13057998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12642738 is a wasteful number, since it uses less digits than its factorization.

12642738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34609.

The product of its digits is 16128, while the sum is 33.

The square root of 12642738 is about 3555.6628074102. The cubic root of 12642738 is about 232.9594752290.

The spelling of 12642738 in words is "twelve million, six hundred forty-two thousand, seven hundred thirty-eight".