128515245 has 16 divisors (see below), whose sum is σ = 211182720. Its totient is φ = 66688704.

The previous prime is 128515217. The next prime is 128515253. The reversal of 128515245 is 542515821.

It is not a de Polignac number, because 128515245 - 2⁹ = 128514733 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 115225 + ... + 116334.

It is an arithmetic number, because the mean of its divisors is an integer number (13198920).

Almost surely, 2^128515245 is an apocalyptic number.

128515245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128515245 is a deficient number, since it is larger than the sum of its proper divisors (82667475).

128515245 is a wasteful number, since it uses less digits than its factorization.

128515245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231604.

The product of its digits is 16000, while the sum is 33.

The square root of 128515245 is about 11336.4564569357. The cubic root of 128515245 is about 504.6437313339.

The spelling of 128515245 in words is "one hundred twenty-eight million, five hundred fifteen thousand, two hundred forty-five".