128554685 has 16 divisors (see below), whose sum is σ = 179904000. Its totient is φ = 88150608.

The previous prime is 128554681. The next prime is 128554693. The reversal of 128554685 is 586455821.

It is not a de Polignac number, because 128554685 - 2² = 128554681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128554681) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35765 + ... + 39194.

It is an arithmetic number, because the mean of its divisors is an integer number (11244000).

Almost surely, 2^128554685 is an apocalyptic number.

It is an amenable number.

128554685 is a deficient number, since it is larger than the sum of its proper divisors (51349315).

128554685 is an frugal number, since it uses more digits than its factorization.

128554685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74985 (or 74971 counting only the distinct ones).

The product of its digits is 384000, while the sum is 44.

The square root of 128554685 is about 11338.1958441368. The cubic root of 128554685 is about 504.6953493685.

The spelling of 128554685 in words is "one hundred twenty-eight million, five hundred fifty-four thousand, six hundred eighty-five".