123243255 has 32 divisors (see below), whose sum is σ = 219568320. Its totient is φ = 65589120.

The previous prime is 123243247. The next prime is 123243257. The reversal of 123243255 is 552342321.

It is a happy number.

123243255 is a `hidden beast` number, since 12 + 324 + 325 + 5 = 666.

It is not a de Polignac number, because 123243255 - 2³ = 123243247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103765 + ... + 104945.

It is an arithmetic number, because the mean of its divisors is an integer number (6861510).

Almost surely, 2^123243255 is an apocalyptic number.

123243255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123243255 is a deficient number, since it is larger than the sum of its proper divisors (96325065).

123243255 is a wasteful number, since it uses less digits than its factorization.

123243255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1962 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 123243255 is about 11101.4978719090. The cubic root of 123243255 is about 497.6466138594.

Adding to 123243255 its reverse (552342321), we get a palindrome (675585576).

The spelling of 123243255 in words is "one hundred twenty-three million, two hundred forty-three thousand, two hundred fifty-five".