123115200 has 168 divisors, whose sum is σ = 435211728. Its totient is φ = 30289920.

The previous prime is 123115171. The next prime is 123115271. The reversal of 123115200 is 2511321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123115200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61414 + ... + 63386.

It is an arithmetic number, because the mean of its divisors is an integer number (2590546).

Almost surely, 2^123115200 is an apocalyptic number.

123115200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123115200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217605864).

123115200 is an abundant number, since it is smaller than the sum of its proper divisors (312096528).

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

123115200 is a wasteful number, since it uses less digits than its factorization.

123115200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 123115200 is about 11095.7289080078. The cubic root of 123115200 is about 497.4741954411.

Adding to 123115200 its reverse (2511321), we get a palindrome (125626521).

The spelling of 123115200 in words is "one hundred twenty-three million, one hundred fifteen thousand, two hundred".