65545 has 4 divisors (see below), whose sum is σ = 78660. Its totient is φ = 52432.

The previous prime is 65543. The next prime is 65551. The reversal of 65545 is 54556.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24336 + 41209 = 156^2 + 203^2 .

It is a cyclic number.

It is not a de Polignac number, because 65545 - 2¹ = 65543 is a prime.

It is a super-2 number, since 2×65545² = 8592294050, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (65543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6550 + ... + 6559.

It is an arithmetic number, because the mean of its divisors is an integer number (19665).

2⁶⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

65545 is a deficient number, since it is larger than the sum of its proper divisors (13115).

65545 is a wasteful number, since it uses less digits than its factorization.

65545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13114.

The product of its digits is 3000, while the sum is 25.

The square root of 65545 is about 256.0175775215. The cubic root of 65545 is about 40.3193190996.

The spelling of 65545 in words is "sixty-five thousand, five hundred forty-five".