It is a sphenic number, since it is the product of 3 distinct primes.
It is a de Polignac number, because none of the positive numbers 2k-42566245 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 42566245.
It is a congruent number.
It is an unprimeable number.
Almost surely, 242566245 is an apocalyptic number.
It is an amenable number.
42566245 is a wasteful number, since it uses less digits than its factorization.
42566245 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6995.
The square root of 42566245 is about 6524.2811864603. The cubic root of 42566245 is about 349.1578255145.
The spelling of 42566245 in words is "forty-two million, five hundred sixty-six thousand, two hundred forty-five".