It is a nialpdrome in base 11.
It is a congruent number.
21415238 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1415238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584576).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1415238 is a wasteful number, since it uses less digits than its factorization.
1415238 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 580.
The square root of 1415238 is about 1189.6377599925. The cubic root of 1415238 is about 112.2733015119.
Subtracting 1415238 from its reverse (8325141), we obtain a triangular number (6909903 = T3717).
The spelling of 1415238 in words is "one million, four hundred fifteen thousand, two hundred thirty-eight".