281362 has 4 divisors (see below), whose sum is σ = 422046. Its totient is φ = 140680.

The previous prime is 281357. The next prime is 281363. The reversal of 281362 is 263182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 263182 = 2 ⋅131591.

It can be written as a sum of positive squares in only one way, i.e., 279841 + 1521 = 529^2 + 39^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2⁸ + 8² + 3⁴ + 1 + 6⁷ + 2¹⁰ .

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (281363) 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 as a sum of consecutive naturals, namely, 70339 + ... + 70342.

2²⁸¹³⁶² is an apocalyptic number.

281362 is a deficient number, since it is larger than the sum of its proper divisors (140684).

281362 is a wasteful number, since it uses less digits than its factorization.

281362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140683.

The product of its digits is 576, while the sum is 22.

The square root of 281362 is about 530.4356699921. The cubic root of 281362 is about 65.5272306799.

The spelling of 281362 in words is "two hundred eighty-one thousand, three hundred sixty-two".