255457 has 2 divisors, whose sum is σ = 255458. Its totient is φ = 255456.

The previous prime is 255443. The next prime is 255467. The reversal of 255457 is 754552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185761 + 69696 = 431^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 255457 - 2⁷ = 255329 is a prime.

It is not a weakly prime, because it can be changed into another prime (255467) 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, 127728 + 127729.

It is an arithmetic number, because the mean of its divisors is an integer number (127729).

2²⁵⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

255457 is a deficient number, since it is larger than the sum of its proper divisors (1).

255457 is an equidigital number, since it uses as much as digits as its factorization.

255457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7000, while the sum is 28.

The square root of 255457 is about 505.4275417901. The cubic root of 255457 is about 63.4511166140.

It can be divided in two parts, 25545 and 7, that added together give a palindrome (25552).

The spelling of 255457 in words is "two hundred fifty-five thousand, four hundred fifty-seven".