It is a happy number.
It is a zygodrome in base 11.
It is a congruent number.
21405560 is an apocalyptic number.
1405560 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 1405560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2449440).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1405560 is a wasteful number, since it uses less digits than its factorization.
1405560 is an odious number, because the sum of its binary digits is odd.
The square root of 1405560 is about 1185.5631573223. The cubic root of 1405560 is about 112.0167917001.
The spelling of 1405560 in words is "one million, four hundred five thousand, five hundred sixty".