281473 has 4 divisors (see below), whose sum is σ = 282580. Its totient is φ = 280368.

The previous prime is 281431. The next prime is 281509. The reversal of 281473 is 374182.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 374182 = 2 ⋅187091.

It can be written as a sum of positive squares in 2 ways, for example, as 107584 + 173889 = 328^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 281473 - 2¹³ = 273281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43 + ... + 751.

It is an arithmetic number, because the mean of its divisors is an integer number (70645).

2²⁸¹⁴⁷³ is an apocalyptic number.

It is an amenable number.

281473 is a deficient number, since it is larger than the sum of its proper divisors (1107).

281473 is an equidigital number, since it uses as much as digits as its factorization.

281473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106.

The product of its digits is 1344, while the sum is 25.

The square root of 281473 is about 530.5402906472. The cubic root of 281473 is about 65.5358465867.

The spelling of 281473 in words is "two hundred eighty-one thousand, four hundred seventy-three".