128507005 has 32 divisors (see below), whose sum is σ = 174924288. Its totient is φ = 89812800.

The previous prime is 128506979. The next prime is 128507069. The reversal of 128507005 is 500705821.

It is not a de Polignac number, because 128507005 - 2²⁵ = 94952573 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 31 ways as a sum of consecutive naturals, for example, 158050 + ... + 158860.

It is an arithmetic number, because the mean of its divisors is an integer number (5466384).

Almost surely, 2^128507005 is an apocalyptic number.

It is an amenable number.

128507005 is a deficient number, since it is larger than the sum of its proper divisors (46417283).

128507005 is a wasteful number, since it uses less digits than its factorization.

128507005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 128507005 is about 11336.0930218484. The cubic root of 128507005 is about 504.6329457050.

The spelling of 128507005 in words is "one hundred twenty-eight million, five hundred seven thousand, five".