4170221 has 8 divisors (see below), whose sum is σ = 4566144. Its totient is φ = 3777120.

The previous prime is 4170211. The next prime is 4170227. The reversal of 4170221 is 1220714.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4170221 is a prime.

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 4170221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4170227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3521 + ... + 4553.

It is an arithmetic number, because the mean of its divisors is an integer number (570768).

Almost surely, 2^4170221 is an apocalyptic number.

It is an amenable number.

4170221 is a deficient number, since it is larger than the sum of its proper divisors (395923).

4170221 is a wasteful number, since it uses less digits than its factorization.

4170221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 4170221 is about 2042.1118970321. Note that the first 3 decimals coincide. The cubic root of 4170221 is about 160.9606400447.

Adding to 4170221 its reverse (1220714), we get a palindrome (5390935).

The spelling of 4170221 in words is "four million, one hundred seventy thousand, two hundred twenty-one".