It is a Jordan-Polya number, since it can be written as 8! ⋅ (2!)5.
It is an unprimeable number.
21290240 is an apocalyptic number.
1290240 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 1290240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2555592).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1290240 is an equidigital number, since it uses as much as digits as its factorization.
1290240 is an evil number, because the sum of its binary digits is even.
The square root of 1290240 is about 1135.8873183551. The cubic root of 1290240 is about 108.8654738553.
The spelling of 1290240 in words is "one million, two hundred ninety thousand, two hundred forty".