It is a cyclic number.
It is a Duffinian number.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 521465.
It is an unprimeable number.
2521465 is an apocalyptic number.
It is an amenable number.
521465 is a wasteful number, since it uses less digits than its factorization.
521465 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 376.
The square root of 521465 is about 722.1253353816. The cubic root of 521465 is about 80.4899618413.
The spelling of 521465 in words is "five hundred twenty-one thousand, four hundred sixty-five".