128346925 has 18 divisors (see below), whose sum is σ = 185135658. Its totient is φ = 88008480.

The previous prime is 128346899. The next prime is 128346931. The reversal of 128346925 is 529643821.

It can be written as a sum of positive squares in 3 ways, for example, as 34082244 + 94264681 = 5838^2 + 9709^2 .

It is a de Polignac number, because none of the positive numbers 2^k-128346925 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 51162 + ... + 53611.

Almost surely, 2^128346925 is an apocalyptic number.

It is an amenable number.

128346925 is a deficient number, since it is larger than the sum of its proper divisors (56788733).

128346925 is a wasteful number, since it uses less digits than its factorization.

128346925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104797 (or 104785 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 128346925 is about 11329.0301879728. The cubic root of 128346925 is about 504.4233197572.

The spelling of 128346925 in words is "one hundred twenty-eight million, three hundred forty-six thousand, nine hundred twenty-five".