128040512 has 14 divisors (see below), whose sum is σ = 254080518. Its totient is φ = 64020224.

The previous prime is 128040491. The next prime is 128040529. The reversal of 128040512 is 215040821.

It can be written as a sum of positive squares in only one way, i.e., 127599616 + 440896 = 11296^2 + 664^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000253 + ... + 1000380.

Almost surely, 2^128040512 is an apocalyptic number.

It is an amenable number.

128040512 is a deficient number, since it is larger than the sum of its proper divisors (126040006).

128040512 is an equidigital number, since it uses as much as digits as its factorization.

128040512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000645 (or 2000635 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 128040512 is about 11315.4987517122. The cubic root of 128040512 is about 504.0215830179.

The spelling of 128040512 in words is "one hundred twenty-eight million, forty thousand, five hundred twelve".