65530 has 8 divisors (see below), whose sum is σ = 117972. Its totient is φ = 26208.

The previous prime is 65521. The next prime is 65537. The reversal of 65530 is 3556.

65530 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 64009 + 1521 = 253^2 + 39^2 .

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

It is a nialpdrome in base 4, base 10 and base 16.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 65498 and 65507.

It is not an unprimeable number, because it can be changed into a prime (65537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3267 + ... + 3286.

2⁶⁵⁵³⁰ is an apocalyptic number.

65530 is a deficient number, since it is larger than the sum of its proper divisors (52442).

65530 is a wasteful number, since it uses less digits than its factorization.

65530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560.

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

The square root of 65530 is about 255.9882809818. The cubic root of 65530 is about 40.3162431674.

It can be divided in two parts, 65 and 530, that added together give a palindrome (595).

The spelling of 65530 in words is "sixty-five thousand, five hundred thirty".