8545 has 4 divisors (see below), whose sum is σ = 10260. Its totient is φ = 6832.

The previous prime is 8543. The next prime is 8563. The reversal of 8545 is 5458.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5458 = 2 ⋅2729.

It can be written as a sum of positive squares in 2 ways, for example, as 2304 + 6241 = 48^2 + 79^2 .

It is a cyclic number.

It is not a de Polignac number, because 8545 - 2¹ = 8543 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (8543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (2565).

2⁸⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

8545 is a deficient number, since it is larger than the sum of its proper divisors (1715).

8545 is a wasteful number, since it uses less digits than its factorization.

8545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714.

The product of its digits is 800, while the sum is 22.

The square root of 8545 is about 92.4391691871. The cubic root of 8545 is about 20.4442267445. Note that the first 3 decimals are identical.

The spelling of 8545 in words is "eight thousand, five hundred forty-five".