12782642 has 4 divisors (see below), whose sum is σ = 19173966. Its totient is φ = 6391320.

The previous prime is 12782639. The next prime is 12782647. The reversal of 12782642 is 24628721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11485321 + 1297321 = 3389^2 + 1139^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12782599 and 12782608.

It is not an unprimeable number, because it can be changed into a prime (12782647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195659 + ... + 3195662.

Almost surely, 2^12782642 is an apocalyptic number.

12782642 is a deficient number, since it is larger than the sum of its proper divisors (6391324).

12782642 is an equidigital number, since it uses as much as digits as its factorization.

12782642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6391323.

The product of its digits is 10752, while the sum is 32.

The square root of 12782642 is about 3575.2820867730. The cubic root of 12782642 is about 233.8156314318.

The spelling of 12782642 in words is "twelve million, seven hundred eighty-two thousand, six hundred forty-two".