4517321 has 2 divisors, whose sum is σ = 4517322. Its totient is φ = 4517320.

The previous prime is 4517281. The next prime is 4517323. The reversal of 4517321 is 1237154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4080400 + 436921 = 2020^2 + 661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4517321 is a prime.

It is a Sophie Germain prime.

Together with 4517323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4517323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2258660 + 2258661.

It is an arithmetic number, because the mean of its divisors is an integer number (2258661).

Almost surely, 2^4517321 is an apocalyptic number.

It is an amenable number.

4517321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4517321 is an equidigital number, since it uses as much as digits as its factorization.

4517321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 4517321 is about 2125.3990213605. The cubic root of 4517321 is about 165.3079159931.

The spelling of 4517321 in words is "four million, five hundred seventeen thousand, three hundred twenty-one".