355321 has 2 divisors, whose sum is σ = 355322. Its totient is φ = 355320.

The previous prime is 355307. The next prime is 355331. The reversal of 355321 is 123553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354025 + 1296 = 595^2 + 36^2 .

It is an emirp because it is prime and its reverse (123553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 355321 - 2⁷ = 355193 is a prime.

It is not a weakly prime, because it can be changed into another prime (355331) 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 as a sum of consecutive naturals, namely, 177660 + 177661.

It is an arithmetic number, because the mean of its divisors is an integer number (177661).

2³⁵⁵³²¹ is an apocalyptic number.

It is an amenable number.

355321 is a deficient number, since it is larger than the sum of its proper divisors (1).

355321 is an equidigital number, since it uses as much as digits as its factorization.

355321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 19.

The square root of 355321 is about 596.0880807398. The cubic root of 355321 is about 70.8283229059.

Adding to 355321 its reverse (123553), we get a palindrome (478874).

It can be divided in two parts, 355 and 321, that added together give a palindrome (676).

The spelling of 355321 in words is "three hundred fifty-five thousand, three hundred twenty-one".