647255 has 8 divisors (see below), whose sum is σ = 887712. Its totient is φ = 443808.

The previous prime is 647219. The next prime is 647261. The reversal of 647255 is 552746.

647255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 647255 - 2¹⁴ = 630871 is a prime.

It is a nialpdrome in base 15.

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 647255.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9212 + ... + 9281.

It is an arithmetic number, because the mean of its divisors is an integer number (110964).

2⁶⁴⁷²⁵⁵ is an apocalyptic number.

647255 is a deficient number, since it is larger than the sum of its proper divisors (240457).

647255 is a wasteful number, since it uses less digits than its factorization.

647255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18505.

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

The square root of 647255 is about 804.5215969755. The cubic root of 647255 is about 86.5017986640.

The spelling of 647255 in words is "six hundred forty-seven thousand, two hundred fifty-five".