128131285 has 16 divisors (see below), whose sum is σ = 156499200. Its totient is φ = 100691136.

The previous prime is 128131249. The next prime is 128131291. The reversal of 128131285 is 582131821.

It is a cyclic number.

It is not a de Polignac number, because 128131285 - 2⁹ = 128130773 is a prime.

It is a super-3 number, since 3×128131285³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88951 + ... + 90379.

It is an arithmetic number, because the mean of its divisors is an integer number (9781200).

Almost surely, 2^128131285 is an apocalyptic number.

It is an amenable number.

128131285 is a deficient number, since it is larger than the sum of its proper divisors (28367915).

128131285 is a wasteful number, since it uses less digits than its factorization.

128131285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740.

The product of its digits is 3840, while the sum is 31.

The square root of 128131285 is about 11319.5090441238. The cubic root of 128131285 is about 504.1406618496.

The spelling of 128131285 in words is "one hundred twenty-eight million, one hundred thirty-one thousand, two hundred eighty-five".