It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3529831 = 157 ⋅22483.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
21389253 is an apocalyptic number.
It is an amenable number.
1389253 is a wasteful number, since it uses less digits than its factorization.
1389253 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11066.
The square root of 1389253 is about 1178.6657711158. The cubic root of 1389253 is about 111.5819074142.
The spelling of 1389253 in words is "one million, three hundred eighty-nine thousand, two hundred fifty-three".