128065925 has 12 divisors (see below), whose sum is σ = 171017700. Its totient is φ = 94571520.

The previous prime is 128065921. The next prime is 128065933. The reversal of 128065925 is 529560821.

It can be written as a sum of positive squares in 6 ways, for example, as 5166529 + 122899396 = 2273^2 + 11086^2 .

It is not a de Polignac number, because 128065925 - 2² = 128065921 is a prime.

It is a super-2 number, since 2×128065925² = 32801762292211250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128065921) 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 in 11 ways as a sum of consecutive naturals, for example, 196700 + ... + 197349.

It is an arithmetic number, because the mean of its divisors is an integer number (14251475).

Almost surely, 2^128065925 is an apocalyptic number.

It is an amenable number.

128065925 is a deficient number, since it is larger than the sum of its proper divisors (42951775).

128065925 is a wasteful number, since it uses less digits than its factorization.

128065925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394072 (or 394067 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 128065925 is about 11316.6216248490. The cubic root of 128065925 is about 504.0549262491.

The spelling of 128065925 in words is "one hundred twenty-eight million, sixty-five thousand, nine hundred twenty-five".