It is a tau number, because it is divible by the number of its divisors (96).
It is an unprimeable number.
Almost surely, 2123131040 is an apocalyptic number.
123131040 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 123131040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196717248).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
123131040 is a wasteful number, since it uses less digits than its factorization.
123131040 is an odious number, because the sum of its binary digits is odd.
The square root of 123131040 is about 11096.4426732174. The cubic root of 123131040 is about 497.4955295340.
Adding to 123131040 its reverse (40131321), we get a palindrome (163262361).
The spelling of 123131040 in words is "one hundred twenty-three million, one hundred thirty-one thousand, forty".