617321 has 4 divisors (see below), whose sum is σ = 653652. Its totient is φ = 580992.

The previous prime is 617311. The next prime is 617327. The reversal of 617321 is 123716.

It is a happy number.

617321 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 270400 + 346921 = 520^2 + 589^2 .

It is not a de Polignac number, because 617321 - 2⁶ = 617257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 617293 and 617302.

It is not an unprimeable number, because it can be changed into a prime (617327) 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 3 ways as a sum of consecutive naturals, for example, 18140 + ... + 18173.

It is an arithmetic number, because the mean of its divisors is an integer number (163413).

2⁶¹⁷³²¹ is an apocalyptic number.

It is an amenable number.

617321 is a deficient number, since it is larger than the sum of its proper divisors (36331).

617321 is a wasteful number, since it uses less digits than its factorization.

617321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36330.

The product of its digits is 252, while the sum is 20.

The square root of 617321 is about 785.6977790474. The cubic root of 617321 is about 85.1471959316.

The spelling of 617321 in words is "six hundred seventeen thousand, three hundred twenty-one".