255545 has 4 divisors (see below), whose sum is σ = 306660. Its totient is φ = 204432.

The previous prime is 255523. The next prime is 255551. The reversal of 255545 is 545552.

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 183184 + 72361 = 428^2 + 269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255545 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25550 + ... + 25559.

It is an arithmetic number, because the mean of its divisors is an integer number (76665).

2²⁵⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

255545 is a deficient number, since it is larger than the sum of its proper divisors (51115).

255545 is an equidigital number, since it uses as much as digits as its factorization.

255545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51114.

The product of its digits is 5000, while the sum is 26.

The square root of 255545 is about 505.5145893048. The cubic root of 255545 is about 63.4584016721.

The spelling of 255545 in words is "two hundred fifty-five thousand, five hundred forty-five".