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24281 is a prime number

24281 has 2 divisors, whose sum is σ = 24282. Its totient is φ = 24280.

The previous prime is 24251. The next prime is 24317. The reversal of 24281 is 18242.

It can be divided in two parts, 242 and 81, that added together give a palindrome (323).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24025 + 256 = 155^2 + 16^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-24281 is a prime.

It is a super-2 number, since 2×242812 = 1179133922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a lonely number, since its distance to closest prime (24251) sets a new record.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 24281.

It is not a weakly prime, because it can be changed into another prime (24251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12140 + 12141.

It is an arithmetic number, because the mean of its divisors is an integer number (12141).

224281 is an apocalyptic number.

It is an amenable number.

24281 is a deficient number, since it is larger than the sum of its proper divisors (1).

24281 is an equidigital number, since it uses as much as digits as its factorization.

24281 is an evil number, because the sum of its binary digits is even.

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

The square root of 24281 is about 155.8236182355. The cubic root of 24281 is about 28.9571304758.

The spelling of 24281 in words is "twenty-four thousand, two hundred eighty-one".