128812 has 6 divisors (see below), whose sum is σ = 225428. Its totient is φ = 64404.

The previous prime is 128767. The next prime is 128813. The reversal of 128812 is 218821.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (128813) 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, 16098 + ... + 16105.

2¹²⁸⁸¹² is an apocalyptic number.

It is an amenable number.

128812 is a deficient number, since it is larger than the sum of its proper divisors (96616).

128812 is a wasteful number, since it uses less digits than its factorization.

128812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32207 (or 32205 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 128812 is about 358.9038868555. The cubic root of 128812 is about 50.5031857612.

Subtracting 128812 from its reverse (218821), we obtain a palindrome (90009).

The spelling of 128812 in words is "one hundred twenty-eight thousand, eight hundred twelve".