128186045 has 8 divisors (see below), whose sum is σ = 165655896. Its totient is φ = 94660416.

The previous prime is 128186011. The next prime is 128186057. The reversal of 128186045 is 540681821.

It can be written as a sum of positive squares in 4 ways, for example, as 21724921 + 106461124 = 4661^2 + 10318^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128186045 - 2⁸ = 128185789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128185996 and 128186014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985982 + ... + 986111.

It is an arithmetic number, because the mean of its divisors is an integer number (20706987).

Almost surely, 2^128186045 is an apocalyptic number.

It is an amenable number.

128186045 is a deficient number, since it is larger than the sum of its proper divisors (37469851).

128186045 is a wasteful number, since it uses less digits than its factorization.

128186045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972111.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 128186045 is about 11321.9276185639. The cubic root of 128186045 is about 504.2124705177.

The spelling of 128186045 in words is "one hundred twenty-eight million, one hundred eighty-six thousand, forty-five".