281086 has 16 divisors (see below), whose sum is σ = 478800. Its totient is φ = 122688.

The previous prime is 281081. The next prime is 281117. The reversal of 281086 is 680182.

It is a self number, because there is not a number n which added to its sum of digits gives 281086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281081) 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 7 ways as a sum of consecutive naturals, for example, 210 + ... + 778.

It is an arithmetic number, because the mean of its divisors is an integer number (29925).

2²⁸¹⁰⁸⁶ is an apocalyptic number.

281086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

281086 is a deficient number, since it is larger than the sum of its proper divisors (197714).

281086 is a wasteful number, since it uses less digits than its factorization.

281086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 281086 is about 530.1754426603. The cubic root of 281086 is about 65.5057975173.

The spelling of 281086 in words is "two hundred eighty-one thousand, eighty-six".