It is an unprimeable number.
21071616 is an apocalyptic number.
1071616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
1071616 is the 598-th octagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1071616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374912).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1071616 is an equidigital number, since it uses as much as digits as its factorization.
1071616 is an odious number, because the sum of its binary digits is odd.
The square root of 1071616 is about 1035.1888716558. The cubic root of 1071616 is about 102.3323772282.
The spelling of 1071616 in words is "one million, seventy-one thousand, six hundred sixteen".