321725 has 12 divisors (see below), whose sum is σ = 422964. Its totient is φ = 241920.

The previous prime is 321721. The next prime is 321733. The reversal of 321725 is 527123.

It can be written as a sum of positive squares in 6 ways, for example, as 1369 + 320356 = 37^2 + 566^2 .

It is not a de Polignac number, because 321725 - 2² = 321721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321697 and 321706.

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 321725.

It is not an unprimeable number, because it can be changed into a prime (321721) 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 11 ways as a sum of consecutive naturals, for example, 47 + ... + 803.

It is an arithmetic number, because the mean of its divisors is an integer number (35247).

2³²¹⁷²⁵ is an apocalyptic number.

It is an amenable number.

321725 is a deficient number, since it is larger than the sum of its proper divisors (101239).

321725 is a wasteful number, since it uses less digits than its factorization.

321725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 779 counting only the distinct ones).

The product of its digits is 420, while the sum is 20.

The square root of 321725 is about 567.2080746957. The cubic root of 321725 is about 68.5217222032.

Adding to 321725 its reverse (527123), we get a palindrome (848848).

The spelling of 321725 in words is "three hundred twenty-one thousand, seven hundred twenty-five".