Adding to 1143521 its reverse (1253411), we get a palindrome (2396932).
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1143521 is a prime.
It is a d-powerful number, because it can be written as 1 + 1 + 410 + 310 + 55 + 215 + 1 .
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 1143521.
21143521 is an apocalyptic number.
It is an amenable number.
1143521 is an equidigital number, since it uses as much as digits as its factorization.
1143521 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2610.
The square root of 1143521 is about 1069.3554133215. The cubic root of 1143521 is about 104.5718315984.
The spelling of 1143521 in words is "one million, one hundred forty-three thousand, five hundred twenty-one".