28241 has 4 divisors (see below), whose sum is σ = 29184. Its totient is φ = 27300.

The previous prime is 28229. The next prime is 28277. The reversal of 28241 is 14282.

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 a de Polignac number, because none of the positive numbers 2^k-28241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425 + ... + 486.

It is an arithmetic number, because the mean of its divisors is an integer number (7296).

2²⁸²⁴¹ is an apocalyptic number.

It is an amenable number.

28241 is a deficient number, since it is larger than the sum of its proper divisors (943).

28241 is an equidigital number, since it uses as much as digits as its factorization.

28241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942.

The product of its digits is 128, while the sum is 17.

The square root of 28241 is about 168.0505876217. The cubic root of 28241 is about 30.4527621359.

Subtracting from 28241 its sum of digits (17), we obtain a square (28224 = 168²).

It can be divided in two parts, 282 and 41, that added together give a palindrome (323).

The spelling of 28241 in words is "twenty-eight thousand, two hundred forty-one".