255445 has 8 divisors (see below), whose sum is σ = 313344. Its totient is φ = 199824.

The previous prime is 255443. The next prime is 255457. The reversal of 255445 is 544552.

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

It is a cyclic number.

It is not a de Polignac number, because 255445 - 2¹ = 255443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309 + ... + 778.

It is an arithmetic number, because the mean of its divisors is an integer number (39168).

2²⁵⁵⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

255445 is a deficient number, since it is larger than the sum of its proper divisors (57899).

255445 is a wasteful number, since it uses less digits than its factorization.

255445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139.

The product of its digits is 4000, while the sum is 25.

The square root of 255445 is about 505.4156705129. The cubic root of 255445 is about 63.4501230674.

Adding to 255445 its reverse (544552), we get a palindrome (799997).

The spelling of 255445 in words is "two hundred fifty-five thousand, four hundred forty-five".