123255 has 32 divisors (see below), whose sum is σ = 241920. Its totient is φ = 59040.

The previous prime is 123239. The next prime is 123259. The reversal of 123255 is 552321.

123255 = 155² + 156² + ... + 159².

It is a happy number.

It is not a de Polignac number, because 123255 - 2⁴ = 123239 is a prime.

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 123255.

It is not an unprimeable number, because it can be changed into a prime (123259) 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 in 31 ways as a sum of consecutive naturals, for example, 1444 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2¹²³²⁵⁵ is an apocalyptic number.

123255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123255 is a deficient number, since it is larger than the sum of its proper divisors (118665).

123255 is a wasteful number, since it uses less digits than its factorization.

123255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 102 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 123255 is about 351.0769146498. The cubic root of 123255 is about 49.7662421821.

Adding to 123255 its reverse (552321), we get a palindrome (675576).

It can be divided in two parts, 123 and 255, that added together give a triangular number (378 = T₂₇).

The spelling of 123255 in words is "one hundred twenty-three thousand, two hundred fifty-five".