12642788 has 6 divisors (see below), whose sum is σ = 22124886. Its totient is φ = 6321392.

The previous prime is 12642787. The next prime is 12642793. The reversal of 12642788 is 88724621.

It can be written as a sum of positive squares in only one way, i.e., 8809024 + 3833764 = 2968^2 + 1958^2 .

It is not an unprimeable number, because it can be changed into a prime (12642787) 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 as a sum of consecutive naturals, namely, 1580345 + ... + 1580352.

It is an arithmetic number, because the mean of its divisors is an integer number (3687481).

Almost surely, 2^12642788 is an apocalyptic number.

It is an amenable number.

12642788 is a deficient number, since it is larger than the sum of its proper divisors (9482098).

12642788 is a wasteful number, since it uses less digits than its factorization.

12642788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160701 (or 3160699 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 12642788 is about 3555.6698384411. The cubic root of 12642788 is about 232.9597823344.

The spelling of 12642788 in words is "twelve million, six hundred forty-two thousand, seven hundred eighty-eight".