281065 has 8 divisors (see below), whose sum is σ = 342720. Its totient is φ = 221232.

The previous prime is 281063. The next prime is 281069. The reversal of 281065 is 560182.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 281065 - 2¹ = 281063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85 + ... + 754.

It is an arithmetic number, because the mean of its divisors is an integer number (42840).

2²⁸¹⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

281065 is a deficient number, since it is larger than the sum of its proper divisors (61655).

281065 is an equidigital number, since it uses as much as digits as its factorization.

281065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 281065 is about 530.1556375254. The cubic root of 281065 is about 65.5041661589.

The spelling of 281065 in words is "two hundred eighty-one thousand, sixty-five".