104165985 has 32 divisors (see below), whose sum is σ = 207793152. Its totient is φ = 43289280.

The previous prime is 104165981. The next prime is 104165993. The reversal of 104165985 is 589561401.

It is not a de Polignac number, because 104165985 - 2² = 104165981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (104165981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43939 + ... + 46248.

It is an arithmetic number, because the mean of its divisors is an integer number (6493536).

Almost surely, 2^104165985 is an apocalyptic number.

104165985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

104165985 is a deficient number, since it is larger than the sum of its proper divisors (103627167).

104165985 is a wasteful number, since it uses less digits than its factorization.

104165985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90213.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 104165985 is about 10206.1738668318. The cubic root of 104165985 is about 470.5169880816.

The spelling of 104165985 in words is "one hundred four million, one hundred sixty-five thousand, nine hundred eighty-five".