128259012 has 48 divisors (see below), whose sum is σ = 342594560. Its totient is φ = 36584352.

The previous prime is 128259011. The next prime is 128259023. The reversal of 128259012 is 210952821.

It is a super-2 number, since 2×128259012² = 32900748318432288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128259011) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 80439 + ... + 82017.

Almost surely, 2^128259012 is an apocalyptic number.

128259012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128259012 is an abundant number, since it is smaller than the sum of its proper divisors (214335548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128259012 is a wasteful number, since it uses less digits than its factorization.

128259012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 128259012 is about 11325.1495354366. The cubic root of 128259012 is about 504.3081228767.

The spelling of 128259012 in words is "one hundred twenty-eight million, two hundred fifty-nine thousand, twelve".