123255128 has 32 divisors (see below), whose sum is σ = 244398000. Its totient is φ = 58112640.

The previous prime is 123255127. The next prime is 123255169. The reversal of 123255128 is 821552321.

It is a self number, because there is not a number n which added to its sum of digits gives 123255128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123255127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33038 + ... + 36578.

Almost surely, 2^123255128 is an apocalyptic number.

It is an amenable number.

123255128 is a deficient number, since it is larger than the sum of its proper divisors (121142872).

123255128 is a wasteful number, since it uses less digits than its factorization.

123255128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795 (or 3791 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 123255128 is about 11102.0326066896. The cubic root of 123255128 is about 497.6625940944.

The spelling of 123255128 in words is "one hundred twenty-three million, two hundred fifty-five thousand, one hundred twenty-eight".