128134485 has 24 divisors (see below), whose sum is σ = 225420000. Its totient is φ = 67316832.

The previous prime is 128134483. The next prime is 128134507. The reversal of 128134485 is 584431821.

It is not a de Polignac number, because 128134485 - 2¹ = 128134483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128134483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18235 + ... + 24264.

It is an arithmetic number, because the mean of its divisors is an integer number (9392500).

Almost surely, 2^128134485 is an apocalyptic number.

128134485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128134485 is a deficient number, since it is larger than the sum of its proper divisors (97285515).

128134485 is a wasteful number, since it uses less digits than its factorization.

128134485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42577 (or 42574 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 128134485 is about 11319.6503921278. The cubic root of 128134485 is about 504.1448586823.

The spelling of 128134485 in words is "one hundred twenty-eight million, one hundred thirty-four thousand, four hundred eighty-five".