123855056 has 40 divisors (see below), whose sum is σ = 267352680. Its totient is φ = 55190016.

The previous prime is 123855037. The next prime is 123855079. The reversal of 123855056 is 650558321.

It can be written as a sum of positive squares in 4 ways, for example, as 11155600 + 112699456 = 3340^2 + 10616^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4235 + ... + 16298.

It is an arithmetic number, because the mean of its divisors is an integer number (6683817).

Almost surely, 2^123855056 is an apocalyptic number.

123855056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123855056 is an abundant number, since it is smaller than the sum of its proper divisors (143497624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123855056 is a wasteful number, since it uses less digits than its factorization.

123855056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20583 (or 20577 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 123855056 is about 11129.0186449660. The cubic root of 123855056 is about 498.4687231699.

The spelling of 123855056 in words is "one hundred twenty-three million, eight hundred fifty-five thousand, fifty-six".