282921 has 4 divisors (see below), whose sum is σ = 377232. Its totient is φ = 188612.

The previous prime is 282917. The next prime is 282959. The reversal of 282921 is 129282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 282921 - 2² = 282917 is a prime.

It is a D-number.

282921 is a lucky number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 282891 and 282900.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 282921.

It is not an unprimeable number, because it can be changed into a prime (282911) 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, 47151 + ... + 47156.

It is an arithmetic number, because the mean of its divisors is an integer number (94308).

2²⁸²⁹²¹ is an apocalyptic number.

It is an amenable number.

282921 is a deficient number, since it is larger than the sum of its proper divisors (94311).

282921 is an equidigital number, since it uses as much as digits as its factorization.

282921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94310.

The product of its digits is 576, while the sum is 24.

The square root of 282921 is about 531.9031866797. The cubic root of 282921 is about 65.6480345443.

It can be divided in two parts, 2829 and 21, that added together give a triangular number (2850 = T₇₅).

The spelling of 282921 in words is "two hundred eighty-two thousand, nine hundred twenty-one".