317421 has 12 divisors (see below), whose sum is σ = 493948. Its totient is φ = 195264.

The previous prime is 317419. The next prime is 317431. The reversal of 317421 is 124713.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 114921 = 450^2 + 339^2 .

It is not a de Polignac number, because 317421 - 2¹ = 317419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 317394 and 317403.

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 317421.

It is not an unprimeable number, because it can be changed into a prime (317411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1240 + ... + 1473.

2³¹⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

317421 is a deficient number, since it is larger than the sum of its proper divisors (176527).

317421 is a wasteful number, since it uses less digits than its factorization.

317421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732 (or 2729 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 317421 is about 563.4012779538. The cubic root of 317421 is about 68.2147908398.

It can be divided in two parts, 3 and 17421, that added together give a square (17424 = 132²).

The spelling of 317421 in words is "three hundred seventeen thousand, four hundred twenty-one", and thus it is an iban number.