Search a number
-
+
285165 = 3256337
BaseRepresentation
bin1000101100111101101
3112111011200
41011213231
533111130
610040113
72265246
oct1054755
9474150
10285165
11185281
12119039
139ca4a
1475ccd
1559760
hex459ed

285165 has 12 divisors (see below), whose sum is σ = 494364. Its totient is φ = 152064.

The previous prime is 285161. The next prime is 285179. The reversal of 285165 is 561582.

It can be written as a sum of positive squares in 2 ways, for example, as 101124 + 184041 = 318^2 + 429^2 .

It is not a de Polignac number, because 285165 - 22 = 285161 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285165.

It is not an unprimeable number, because it can be changed into a prime (285161) by changing a digit.

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, 3124 + ... + 3213.

It is an arithmetic number, because the mean of its divisors is an integer number (41197).

2285165 is an apocalyptic number.

It is an amenable number.

285165 is a deficient number, since it is larger than the sum of its proper divisors (209199).

285165 is a wasteful number, since it uses less digits than its factorization.

285165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348 (or 6345 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 285165 is about 534.0084268998. The cubic root of 285165 is about 65.8211410774.

It can be divided in two parts, 2851 and 65, that added together give a square (2916 = 542).

The spelling of 285165 in words is "two hundred eighty-five thousand, one hundred sixty-five".

Divisors: 1 3 5 9 15 45 6337 19011 31685 57033 95055 285165