4547221 has 8 divisors (see below), whose sum is σ = 5212544. Its totient is φ = 3885840.

The previous prime is 4547219. The next prime is 4547227. The reversal of 4547221 is 1227454.

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

It is not a de Polignac number, because 4547221 - 2¹ = 4547219 is a prime.

It is a Duffinian number.

4547221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4547227) 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, 2176 + ... + 3718.

It is an arithmetic number, because the mean of its divisors is an integer number (651568).

Almost surely, 2^4547221 is an apocalyptic number.

It is an amenable number.

4547221 is a deficient number, since it is larger than the sum of its proper divisors (665323).

4547221 is a wasteful number, since it uses less digits than its factorization.

4547221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971.

The product of its digits is 2240, while the sum is 25.

The square root of 4547221 is about 2132.4213936274. The cubic root of 4547221 is about 165.6718368073.

The spelling of 4547221 in words is "four million, five hundred forty-seven thousand, two hundred twenty-one".