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281055 = 3541457
BaseRepresentation
bin1000100100111011111
3112021112110
41010213133
532443210
610005103
72250255
oct1044737
9467473
10281055
11182185
12116793
139ac08
14745d5
1558420
hex449df

281055 has 16 divisors (see below), whose sum is σ = 461664. Its totient is φ = 145920.

The previous prime is 281053. The next prime is 281063. The reversal of 281055 is 550182.

It is not a de Polignac number, because 281055 - 21 = 281053 is a prime.

It is a plaindrome in base 16.

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 281055.

It is not an unprimeable number, because it can be changed into a prime (281053) 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 15 ways as a sum of consecutive naturals, for example, 387 + ... + 843.

It is an arithmetic number, because the mean of its divisors is an integer number (28854).

2281055 is an apocalyptic number.

281055 is a deficient number, since it is larger than the sum of its proper divisors (180609).

281055 is a wasteful number, since it uses less digits than its factorization.

281055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 281055 is about 530.1462062488. The cubic root of 281055 is about 65.5033892930.

The spelling of 281055 in words is "two hundred eighty-one thousand, fifty-five".

Divisors: 1 3 5 15 41 123 205 457 615 1371 2285 6855 18737 56211 93685 281055