128513605 has 16 divisors (see below), whose sum is σ = 171414144. Its totient is φ = 91698880.

The previous prime is 128513579. The next prime is 128513647. The reversal of 128513605 is 506315821.

It is not a de Polignac number, because 128513605 - 2⁵ = 128513573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19129 + ... + 24958.

It is an arithmetic number, because the mean of its divisors is an integer number (10713384).

Almost surely, 2^128513605 is an apocalyptic number.

It is an amenable number.

128513605 is a deficient number, since it is larger than the sum of its proper divisors (42900539).

128513605 is a wasteful number, since it uses less digits than its factorization.

128513605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44156.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 128513605 is about 11336.3841236966. The cubic root of 128513605 is about 504.6415847163.

The spelling of 128513605 in words is "one hundred twenty-eight million, five hundred thirteen thousand, six hundred five".