282121 has 8 divisors (see below), whose sum is σ = 330624. Its totient is φ = 235680.

The previous prime is 282103. The next prime is 282127. The reversal of 282121 is 121282.

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 282121 - 2⁵ = 282089 is a prime.

282121 is a modest number, since divided by 2121 gives 28 as remainder.

282121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 282095 and 282104.

It is not an unprimeable number, because it can be changed into a prime (282127) 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 7 ways as a sum of consecutive naturals, for example, 205 + ... + 778.

It is an arithmetic number, because the mean of its divisors is an integer number (41328).

2²⁸²¹²¹ is an apocalyptic number.

It is an amenable number.

282121 is a deficient number, since it is larger than the sum of its proper divisors (48503).

282121 is an equidigital number, since it uses as much as digits as its factorization.

282121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031.

The product of its digits is 64, while the sum is 16.

The square root of 282121 is about 531.1506377667. The cubic root of 282121 is about 65.5860996971.

The spelling of 282121 in words is "two hundred eighty-two thousand, one hundred twenty-one".