It is a 3-Lehmer number, since φ(3146221) divides (3146221-1)3.
It is a cyclic number.
It is a Carmichael number.
It is a d-powerful number, because it can be written as 35 + 1 + 410 + 63 + 25 + 221 + 1 .
It is a deceptive number, since it divides R3146220.
It is a Duffinian number.
It is a congruent number.
It is a Poulet number, since it divides 23146220-1.
Almost surely, 23146221 is an apocalyptic number.
3146221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.
It is an amenable number.
3146221 is a wasteful number, since it uses less digits than its factorization.
3146221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 292.
The square root of 3146221 is about 1773.7590027960. The cubic root of 3146221 is about 146.5310770540.
The spelling of 3146221 in words is "three million, one hundred forty-six thousand, two hundred twenty-one".