It is a happy number.
It is a congruent number.
21408120 is an apocalyptic number.
1408120 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 1408120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1408120 is a wasteful number, since it uses less digits than its factorization.
1408120 is an evil number, because the sum of its binary digits is even.
The square root of 1408120 is about 1186.6423218477. The cubic root of 1408120 is about 112.0847572714.
The spelling of 1408120 in words is "one million, four hundred eight thousand, one hundred twenty".