281317 has 2 divisors, whose sum is σ = 281318. Its totient is φ = 281316.

The previous prime is 281297. The next prime is 281321. The reversal of 281317 is 713182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256036 + 25281 = 506^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 281317 - 2⁷ = 281189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140658 + 140659.

It is an arithmetic number, because the mean of its divisors is an integer number (140659).

2²⁸¹³¹⁷ is an apocalyptic number.

It is an amenable number.

281317 is a deficient number, since it is larger than the sum of its proper divisors (1).

281317 is an equidigital number, since it uses as much as digits as its factorization.

281317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 22.

The square root of 281317 is about 530.3932503341. The cubic root of 281317 is about 65.5237370991.

Adding to 281317 its reverse (713182), we get a palindrome (994499).

The spelling of 281317 in words is "two hundred eighty-one thousand, three hundred seventeen".