123530056 has 64 divisors (see below), whose sum is σ = 266555520. Its totient is φ = 53222400.

The previous prime is 123530051. The next prime is 123530081. The reversal of 123530056 is 650035321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 123530056.

It is not an unprimeable number, because it can be changed into a prime (123530051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102256 + ... + 103456.

It is an arithmetic number, because the mean of its divisors is an integer number (4164930).

Almost surely, 2^123530056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123530056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133277760).

123530056 is an abundant number, since it is smaller than the sum of its proper divisors (143025464).

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

123530056 is a wasteful number, since it uses less digits than its factorization.

123530056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 123530056 is about 11114.4075865518. The cubic root of 123530056 is about 498.0323414640.

Adding to 123530056 its reverse (650035321), we get a palindrome (773565377).

The spelling of 123530056 in words is "one hundred twenty-three million, five hundred thirty thousand, fifty-six".