281191 has 2 divisors, whose sum is σ = 281192. Its totient is φ = 281190.

The previous prime is 281189. The next prime is 281207. The reversal of 281191 is 191182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281191 - 2¹ = 281189 is a prime.

Together with 281189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140595 + 140596.

It is an arithmetic number, because the mean of its divisors is an integer number (140596).

2²⁸¹¹⁹¹ is an apocalyptic number.

281191 is a deficient number, since it is larger than the sum of its proper divisors (1).

281191 is an equidigital number, since it uses as much as digits as its factorization.

281191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 22.

The square root of 281191 is about 530.2744572389. The cubic root of 281191 is about 65.5139530906.

Subtracting from 281191 its reverse (191182), we obtain a palindrome (90009).

The spelling of 281191 in words is "two hundred eighty-one thousand, one hundred ninety-one".