128534115 has 32 divisors (see below), whose sum is σ = 213397056. Its totient is φ = 66009600.

The previous prime is 128534111. The next prime is 128534167. The reversal of 128534115 is 511435821.

It is not a de Polignac number, because 128534115 - 2² = 128534111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128534111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54909 + ... + 57201.

It is an arithmetic number, because the mean of its divisors is an integer number (6668658).

Almost surely, 2^128534115 is an apocalyptic number.

128534115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128534115 is a deficient number, since it is larger than the sum of its proper divisors (84862941).

128534115 is a wasteful number, since it uses less digits than its factorization.

128534115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439.

The product of its digits is 4800, while the sum is 30.

The square root of 128534115 is about 11337.2886970386. The cubic root of 128534115 is about 504.6684292110.

Adding to 128534115 its reverse (511435821), we get a palindrome (639969936).

The spelling of 128534115 in words is "one hundred twenty-eight million, five hundred thirty-four thousand, one hundred fifteen".