101685 has 8 divisors (see below), whose sum is σ = 162720. Its totient is φ = 54224.

The previous prime is 101681. The next prime is 101693. The reversal of 101685 is 586101.

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 101685 - 2² = 101681 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3375 + ... + 3404.

It is an arithmetic number, because the mean of its divisors is an integer number (20340).

2¹⁰¹⁶⁸⁵ is an apocalyptic number.

101685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101685 is a deficient number, since it is larger than the sum of its proper divisors (61035).

101685 is an equidigital number, since it uses as much as digits as its factorization.

101685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6787.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 101685 is about 318.8808554931. The cubic root of 101685 is about 46.6751401847.

Adding to 101685 its reverse (586101), we get a palindrome (687786).

Subtracting 101685 from its reverse (586101), we obtain a square (484416 = 696²).

The spelling of 101685 in words is "one hundred one thousand, six hundred eighty-five".