128108125 has 10 divisors (see below), whose sum is σ = 160084694. Its totient is φ = 102486000.

The previous prime is 128108119. The next prime is 128108143. The reversal of 128108125 is 521801821.

It can be written as a sum of positive squares in 5 ways, for example, as 72352036 + 55756089 = 8506^2 + 7467^2 .

It is not a de Polignac number, because 128108125 - 2³ = 128108117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128108093 and 128108102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 101862 + ... + 103111.

Almost surely, 2^128108125 is an apocalyptic number.

It is an amenable number.

128108125 is a deficient number, since it is larger than the sum of its proper divisors (31976569).

128108125 is an frugal number, since it uses more digits than its factorization.

128108125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204993 (or 204978 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 128108125 is about 11318.4859853251. The cubic root of 128108125 is about 504.1102851900.

Adding to 128108125 its reverse (521801821), we get a palindrome (649909946).

The spelling of 128108125 in words is "one hundred twenty-eight million, one hundred eight thousand, one hundred twenty-five".