3121317 has 18 divisors (see below), whose sum is σ = 4635878. Its totient is φ = 2023632.

The previous prime is 3121303. The next prime is 3121333. The reversal of 3121317 is 7131213.

3121317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2405601 + 715716 = 1551^2 + 846^2 .

It is not a de Polignac number, because 3121317 - 2⁶ = 3121253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121367) 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 in 17 ways as a sum of consecutive naturals, for example, 19803 + ... + 19959.

Almost surely, 2^3121317 is an apocalyptic number.

It is an amenable number.

3121317 is a deficient number, since it is larger than the sum of its proper divisors (1514561).

3121317 is a wasteful number, since it uses less digits than its factorization.

3121317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 207 counting only the distinct ones).

The product of its digits is 126, while the sum is 18.

The square root of 3121317 is about 1766.7249361460. The cubic root of 3121317 is about 146.1434288264.

The spelling of 3121317 in words is "three million, one hundred twenty-one thousand, three hundred seventeen".