265321 has 8 divisors (see below), whose sum is σ = 313920. Its totient is φ = 219408.

The previous prime is 265313. The next prime is 265333. The reversal of 265321 is 123562.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 265321 - 2³ = 265313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (39240).

2²⁶⁵³²¹ is an apocalyptic number.

It is an amenable number.

265321 is a deficient number, since it is larger than the sum of its proper divisors (48599).

265321 is a wasteful number, since it uses less digits than its factorization.

265321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343.

The product of its digits is 360, while the sum is 19.

The square root of 265321 is about 515.0931954511. The cubic root of 265321 is about 64.2575074373.

Adding to 265321 its reverse (123562), we get a palindrome (388883).

The spelling of 265321 in words is "two hundred sixty-five thousand, three hundred twenty-one".