255647 has 8 divisors (see below), whose sum is σ = 297600. Its totient is φ = 215064.

The previous prime is 255641. The next prime is 255649. The reversal of 255647 is 746552.

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 255647 - 2¹⁰ = 254623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255647.

It is not an unprimeable number, because it can be changed into a prime (255641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104 + ... + 722.

It is an arithmetic number, because the mean of its divisors is an integer number (37200).

2²⁵⁵⁶⁴⁷ is an apocalyptic number.

255647 is the 413-rd pentagonal number.

255647 is a deficient number, since it is larger than the sum of its proper divisors (41953).

255647 is an equidigital number, since it uses as much as digits as its factorization.

255647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its digits is 8400, while the sum is 29.

The square root of 255647 is about 505.6154665356. The cubic root of 255647 is about 63.4668436242.

The spelling of 255647 in words is "two hundred fifty-five thousand, six hundred forty-seven".