281066 has 4 divisors (see below), whose sum is σ = 421602. Its totient is φ = 140532.

The previous prime is 281063. The next prime is 281069. The reversal of 281066 is 660182.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (281063) and next prime (281069).

It can be written as a sum of positive squares in only one way, i.e., 279841 + 1225 = 529^2 + 35^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281066.

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 as a sum of consecutive naturals, namely, 70265 + ... + 70268.

2²⁸¹⁰⁶⁶ is an apocalyptic number.

281066 is a deficient number, since it is larger than the sum of its proper divisors (140536).

281066 is a wasteful number, since it uses less digits than its factorization.

281066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140535.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 281066 is about 530.1565806439. The cubic root of 281066 is about 65.5042438444.

The spelling of 281066 in words is "two hundred eighty-one thousand, sixty-six".