It is a tau number, because it is divible by the number of its divisors (32).
It is a self number, because there is not a number n which added to its sum of digits gives 123520.
2123520 is an apocalyptic number.
123520 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 123520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148410).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
123520 is an equidigital number, since it uses as much as digits as its factorization.
123520 is an evil number, because the sum of its binary digits is even.
The square root of 123520 is about 351.4541221838. The cubic root of 123520 is about 49.8018826942.
Adding to 123520 its reverse (25321), we get a palindrome (148841).
The spelling of 123520 in words is "one hundred twenty-three thousand, five hundred twenty".