It is a congruent number.
It is an unprimeable number.
21530900 is an apocalyptic number.
1530900 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 1530900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2847040).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1530900 is an equidigital number, since it uses as much as digits as its factorization.
1530900 is an evil number, because the sum of its binary digits is even.
The square root of 1530900 is about 1237.2954376381. The cubic root of 1530900 is about 115.2521248489.
The spelling of 1530900 in words is "one million, five hundred thirty thousand, nine hundred".