255247 has 2 divisors, whose sum is σ = 255248. Its totient is φ = 255246.

The previous prime is 255239. The next prime is 255251. The reversal of 255247 is 742552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255247 - 2³ = 255239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255217) by changing a digit.

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 as a sum of consecutive naturals, namely, 127623 + 127624.

It is an arithmetic number, because the mean of its divisors is an integer number (127624).

2²⁵⁵²⁴⁷ is an apocalyptic number.

255247 is a deficient number, since it is larger than the sum of its proper divisors (1).

255247 is an equidigital number, since it uses as much as digits as its factorization.

255247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 25.

The square root of 255247 is about 505.2197541664. The cubic root of 255247 is about 63.4337250538.

Adding to 255247 its reverse (742552), we get a palindrome (997799).

The spelling of 255247 in words is "two hundred fifty-five thousand, two hundred forty-seven".