273281 has 2 divisors, whose sum is σ = 273282. Its totient is φ = 273280.

The previous prime is 273271. The next prime is 273283. The reversal of 273281 is 182372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144400 + 128881 = 380^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 273281 - 2¹⁰ = 272257 is a prime.

It is a super-2 number, since 2×273281² = 149365009922, which contains 22 as substring.

Together with 273283, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 5.

It is not a weakly prime, because it can be changed into another prime (273283) 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 as a sum of consecutive naturals, namely, 136640 + 136641.

It is an arithmetic number, because the mean of its divisors is an integer number (136641).

2²⁷³²⁸¹ is an apocalyptic number.

It is an amenable number.

273281 is a deficient number, since it is larger than the sum of its proper divisors (1).

273281 is an equidigital number, since it uses as much as digits as its factorization.

273281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 273281 is about 522.7628525441. The cubic root of 273281 is about 64.8937910478.

Subtracting from 273281 its reverse (182372), we obtain a palindrome (90909).

The spelling of 273281 in words is "two hundred seventy-three thousand, two hundred eighty-one".