104128785 has 12 divisors (see below), whose sum is σ = 180489972. Its totient is φ = 55535328.

The previous prime is 104128771. The next prime is 104128793. The reversal of 104128785 is 587821401.

It can be written as a sum of positive squares in 2 ways, for example, as 61826769 + 42302016 = 7863^2 + 6504^2 .

It is not a de Polignac number, because 104128785 - 2⁵ = 104128753 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1156942 + ... + 1157031.

It is an arithmetic number, because the mean of its divisors is an integer number (15040831).

Almost surely, 2^104128785 is an apocalyptic number.

104128785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

104128785 is a deficient number, since it is larger than the sum of its proper divisors (76361187).

104128785 is a wasteful number, since it uses less digits than its factorization.

104128785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313984 (or 2313981 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 104128785 is about 10204.3512777638. The cubic root of 104128785 is about 470.4609707040.

The spelling of 104128785 in words is "one hundred four million, one hundred twenty-eight thousand, seven hundred eighty-five".