321263 has 4 divisors (see below), whose sum is σ = 322608. Its totient is φ = 319920.

The previous prime is 321247. The next prime is 321289. The reversal of 321263 is 362123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362123 = 29 ⋅12487.

It is a cyclic number.

It is not a de Polignac number, because 321263 - 2⁴ = 321247 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321203) 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 in 3 ways as a sum of consecutive naturals, for example, 206 + ... + 827.

It is an arithmetic number, because the mean of its divisors is an integer number (80652).

2³²¹²⁶³ is an apocalyptic number.

321263 is a deficient number, since it is larger than the sum of its proper divisors (1345).

321263 is a wasteful number, since it uses less digits than its factorization.

321263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344.

The product of its digits is 216, while the sum is 17.

The square root of 321263 is about 566.8006704301. The cubic root of 321263 is about 68.4889072204.

Adding to 321263 its reverse (362123), we get a palindrome (683386).

The spelling of 321263 in words is "three hundred twenty-one thousand, two hundred sixty-three".