It is a Curzon number.
It is a congruent number.
It is an unprimeable number.
21013550 is an apocalyptic number.
1013550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 1013550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1305720).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1013550 is a wasteful number, since it uses less digits than its factorization.
1013550 is an evil number, because the sum of its binary digits is even.
The square root of 1013550 is about 1006.7522038714. The cubic root of 1013550 is about 100.4496418584.
Adding to 1013550 its reverse (553101), we get a palindrome (1566651).
The spelling of 1013550 in words is "one million, thirteen thousand, five hundred fifty".