4917221 has 8 divisors (see below), whose sum is σ = 5014464. Its totient is φ = 4821120.

The previous prime is 4917217. The next prime is 4917277. The reversal of 4917221 is 1227194.

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

It is a cyclic number.

It is not a de Polignac number, because 4917221 - 2² = 4917217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4917721) 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, 15656 + ... + 15966.

It is an arithmetic number, because the mean of its divisors is an integer number (626808).

Almost surely, 2^4917221 is an apocalyptic number.

It is an amenable number.

4917221 is a deficient number, since it is larger than the sum of its proper divisors (97243).

4917221 is a wasteful number, since it uses less digits than its factorization.

4917221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571.

The product of its digits is 1008, while the sum is 26.

The square root of 4917221 is about 2217.4807778197. The cubic root of 4917221 is about 170.0486711852.

The spelling of 4917221 in words is "four million, nine hundred seventeen thousand, two hundred twenty-one".