128507514 has 16 divisors (see below), whose sum is σ = 258502752. Its totient is φ = 42587888.

The previous prime is 128507513. The next prime is 128507543. The reversal of 128507514 is 415705821.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (128507513) 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 7 ways as a sum of consecutive naturals, for example, 60864 + ... + 62939.

It is an arithmetic number, because the mean of its divisors is an integer number (16156422).

Almost surely, 2^128507514 is an apocalyptic number.

128507514 is an abundant number, since it is smaller than the sum of its proper divisors (129995238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128507514 is a wasteful number, since it uses less digits than its factorization.

128507514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123981.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 128507514 is about 11336.1154722418. The cubic root of 128507514 is about 504.6336119665.

The spelling of 128507514 in words is "one hundred twenty-eight million, five hundred seven thousand, five hundred fourteen".