317021 has 2 divisors, whose sum is σ = 317022. Its totient is φ = 317020.

The previous prime is 317011. The next prime is 317029. The reversal of 317021 is 120713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235225 + 81796 = 485^2 + 286^2 .

It is an emirp because it is prime and its reverse (120713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317021 - 2⁶ = 316957 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 316987 and 317005.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 317021.

It is not a weakly prime, because it can be changed into another prime (317029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158510 + 158511.

It is an arithmetic number, because the mean of its divisors is an integer number (158511).

2³¹⁷⁰²¹ is an apocalyptic number.

It is an amenable number.

317021 is a deficient number, since it is larger than the sum of its proper divisors (1).

317021 is an equidigital number, since it uses as much as digits as its factorization.

317021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 317021 is about 563.0461792784. The cubic root of 317021 is about 68.1861250343.

Adding to 317021 its reverse (120713), we get a palindrome (437734).

The spelling of 317021 in words is "three hundred seventeen thousand, twenty-one", and thus it is an iban number.