1005221 has 8 divisors (see below), whose sum is σ = 1157184. Its totient is φ = 855360.

The previous prime is 1005217. The next prime is 1005223. The reversal of 1005221 is 1225001.

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 1005221 - 2² = 1005217 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005223) 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, 701 + ... + 1581.

It is an arithmetic number, because the mean of its divisors is an integer number (144648).

2^1005221 is an apocalyptic number.

It is an amenable number.

1005221 is a deficient number, since it is larger than the sum of its proper divisors (151963).

1005221 is an equidigital number, since it uses as much as digits as its factorization.

1005221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1005221 is about 1002.6071015109. The cubic root of 1005221 is about 100.1737313328.

The spelling of 1005221 in words is "one million, five thousand, two hundred twenty-one".