20281241 has 2 divisors, whose sum is σ = 20281242. Its totient is φ = 20281240.

The previous prime is 20281229. The next prime is 20281253. The reversal of 20281241 is 14218202.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20281229) and next prime (20281253).

It can be written as a sum of positive squares in only one way, i.e., 15241216 + 5040025 = 3904^2 + 2245^2 .

It is a cyclic number.

It is not a de Polignac number, because 20281241 - 2¹⁰ = 20280217 is a prime.

It is a super-2 number, since 2×20281241² = 822657473000162, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (20281211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10140620 + 10140621.

It is an arithmetic number, because the mean of its divisors is an integer number (10140621).

Almost surely, 2^20281241 is an apocalyptic number.

It is an amenable number.

20281241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20281241 is an equidigital number, since it uses as much as digits as its factorization.

20281241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 20281241 is about 4503.4698844336. The cubic root of 20281241 is about 272.7081864455.

Adding to 20281241 its reverse (14218202), we get a palindrome (34499443).

The spelling of 20281241 in words is "twenty million, two hundred eighty-one thousand, two hundred forty-one".