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100285 = 531647
BaseRepresentation
bin11000011110111101
312002120021
4120132331
511202120
62052141
7565243
oct303675
9162507
10100285
1169389
124a051
1336853
1428793
151eaaa
hex187bd

100285 has 8 divisors (see below), whose sum is σ = 124416. Its totient is φ = 77520.

The previous prime is 100279. The next prime is 100291. The reversal of 100285 is 582001.

It is a happy number.

100285 is nontrivially palindromic in base 3.

It is an interprime number because it is at equal distance from previous prime (100279) and next prime (100291).

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

It is a de Polignac number, because none of the positive numbers 2k-100285 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 169 + ... + 478.

It is an arithmetic number, because the mean of its divisors is an integer number (15552).

2100285 is an apocalyptic number.

It is an amenable number.

100285 is a deficient number, since it is larger than the sum of its proper divisors (24131).

100285 is an equidigital number, since it uses as much as digits as its factorization.

100285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 100285 is about 316.6780699701. The cubic root of 100285 is about 46.4599416059.

Adding to 100285 its reverse (582001), we get a palindrome (682286).

The spelling of 100285 in words is "one hundred thousand, two hundred eighty-five".

Divisors: 1 5 31 155 647 3235 20057 100285