100685 has 8 divisors (see below), whose sum is σ = 130200. Its totient is φ = 74304.

The previous prime is 100673. The next prime is 100693. The reversal of 100685 is 586001.

It can be written as a sum of positive squares in 4 ways, for example, as 196 + 100489 = 14^2 + 317^2 .

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 100685 - 2⁴ = 100669 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710 + ... + 839.

It is an arithmetic number, because the mean of its divisors is an integer number (16275).

2¹⁰⁰⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

100685 is a deficient number, since it is larger than the sum of its proper divisors (29515).

100685 is a wasteful number, since it uses less digits than its factorization.

100685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 100685 is about 317.3089976663. The cubic root of 100685 is about 46.5216302035.

Adding to 100685 its reverse (586001), we get a palindrome (686686).

The spelling of 100685 in words is "one hundred thousand, six hundred eighty-five".