12780112 has 10 divisors (see below), whose sum is σ = 24761498. Its totient is φ = 6390048.

The previous prime is 12780017. The next prime is 12780113. The reversal of 12780112 is 21108721.

It can be written as a sum of positive squares in only one way, i.e., 10601536 + 2178576 = 3256^2 + 1476^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399363 + ... + 399394.

Almost surely, 2^12780112 is an apocalyptic number.

It is an amenable number.

12780112 is a deficient number, since it is larger than the sum of its proper divisors (11981386).

12780112 is an equidigital number, since it uses as much as digits as its factorization.

12780112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798765 (or 798759 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 12780112 is about 3574.9282510283. The cubic root of 12780112 is about 233.8002044547.

Adding to 12780112 its reverse (21108721), we get a palindrome (33888833).

The spelling of 12780112 in words is "twelve million, seven hundred eighty thousand, one hundred twelve".