Multipling 125440 by its product of nonzero digits (160), we get a square (20070400 = 44802).
125440 divided by its product of nonzero digits (160) gives a square (784 = 282).
Adding to 125440 its reverse (44521), we get a palindrome (169961).
It is an Ulam number.
125440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2125440 is an apocalyptic number.
125440 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 125440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174933).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
125440 is an frugal number, since it uses more digits than its factorization.
125440 is an evil number, because the sum of its binary digits is even.
The square root of 125440 is about 354.1750979389. The cubic root of 125440 is about 50.0585979654.
The spelling of 125440 in words is "one hundred twenty-five thousand, four hundred forty".