281105 has 16 divisors (see below), whose sum is σ = 388800. Its totient is φ = 192960.

The previous prime is 281081. The next prime is 281117. The reversal of 281105 is 501182.

281105 is nontrivially palindromic in base 4.

It is a de Polignac number, because none of the positive numbers 2^k-281105 is a prime.

It is an Ulam number.

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 281105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 911 + ... + 1179.

It is an arithmetic number, because the mean of its divisors is an integer number (24300).

2²⁸¹¹⁰⁵ is an apocalyptic number.

It is an amenable number.

281105 is a deficient number, since it is larger than the sum of its proper divisors (107695).

281105 is a wasteful number, since it uses less digits than its factorization.

281105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 281105 is about 530.1933609543. The cubic root of 281105 is about 65.5072734382.

Adding to 281105 its reverse (501182), we get a palindrome (782287).

The spelling of 281105 in words is "two hundred eighty-one thousand, one hundred five".