255121 has 2 divisors, whose sum is σ = 255122. Its totient is φ = 255120.

The previous prime is 255107. The next prime is 255127. The reversal of 255121 is 121552.

255121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190096 + 65025 = 436^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 255121 - 2⁷ = 254993 is a prime.

255121 is a lucky number.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 255095 and 255104.

It is not a weakly prime, because it can be changed into another prime (255127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127560 + 127561.

It is an arithmetic number, because the mean of its divisors is an integer number (127561).

2²⁵⁵¹²¹ is an apocalyptic number.

It is an amenable number.

255121 is a deficient number, since it is larger than the sum of its proper divisors (1).

255121 is an equidigital number, since it uses as much as digits as its factorization.

255121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100, while the sum is 16.

The square root of 255121 is about 505.0950405617. The cubic root of 255121 is about 63.4232855385.

Adding to 255121 its reverse (121552), we get a palindrome (376673).

The spelling of 255121 in words is "two hundred fifty-five thousand, one hundred twenty-one".