65243 has 4 divisors (see below), whose sum is σ = 66528. Its totient is φ = 63960.

The previous prime is 65239. The next prime is 65257. The reversal of 65243 is 34256.

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

It is a cyclic number.

It is not a de Polignac number, because 65243 - 2² = 65239 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (65203) 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, 563 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (16632).

2⁶⁵²⁴³ is an apocalyptic number.

65243 is a deficient number, since it is larger than the sum of its proper divisors (1285).

65243 is a wasteful number, since it uses less digits than its factorization.

65243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284.

The product of its digits is 720, while the sum is 20.

The square root of 65243 is about 255.4270933163. The cubic root of 65243 is about 40.2572997061.

Adding to 65243 its reverse (34256), we get a palindrome (99499).

The spelling of 65243 in words is "sixty-five thousand, two hundred forty-three".