128549125 has 8 divisors (see below), whose sum is σ = 160429464. Its totient is φ = 102839200.

The previous prime is 128549119. The next prime is 128549147. The reversal of 128549125 is 521945821.

It can be written as a sum of positive squares in 4 ways, for example, as 33895684 + 94653441 = 5822^2 + 9729^2 .

It is not a de Polignac number, because 128549125 - 2⁹ = 128548613 is a prime.

It is a super-3 number, since 3×128549125³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 514072 + ... + 514321.

It is an arithmetic number, because the mean of its divisors is an integer number (20053683).

Almost surely, 2^128549125 is an apocalyptic number.

It is an amenable number.

128549125 is a deficient number, since it is larger than the sum of its proper divisors (31880339).

128549125 is an equidigital number, since it uses as much as digits as its factorization.

128549125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028408 (or 1028398 counting only the distinct ones).

The product of its digits is 28800, while the sum is 37.

The square root of 128549125 is about 11337.9506525650. The cubic root of 128549125 is about 504.6880732260.

The spelling of 128549125 in words is "one hundred twenty-eight million, five hundred forty-nine thousand, one hundred twenty-five".