128913125 has 40 divisors (see below), whose sum is σ = 186240384. Its totient is φ = 88160000.

The previous prime is 128913107. The next prime is 128913133. The reversal of 128913125 is 521319821.

It is a happy number.

It is not a de Polignac number, because 128913125 - 2¹⁰ = 128912101 is a prime.

It is a super-3 number, since 3×128913125³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128913091 and 128913100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 116324 + ... + 117426.

Almost surely, 2^128913125 is an apocalyptic number.

It is an amenable number.

128913125 is a deficient number, since it is larger than the sum of its proper divisors (57327259).

128913125 is a wasteful number, since it uses less digits than its factorization.

128913125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1136 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 128913125 is about 11353.9915888642. The cubic root of 128913125 is about 505.1639829515.

The spelling of 128913125 in words is "one hundred twenty-eight million, nine hundred thirteen thousand, one hundred twenty-five".