1006221 has 16 divisors (see below), whose sum is σ = 1433600. Its totient is φ = 625968.

The previous prime is 1006219. The next prime is 1006231. The reversal of 1006221 is 1226001.

It is not a de Polignac number, because 1006221 - 2¹ = 1006219 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1006197 and 1006206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7170 + ... + 7308.

It is an arithmetic number, because the mean of its divisors is an integer number (89600).

2^1006221 is an apocalyptic number.

It is an amenable number.

1006221 is a deficient number, since it is larger than the sum of its proper divisors (427379).

1006221 is a wasteful number, since it uses less digits than its factorization.

1006221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1006221 is about 1003.1056773840. The cubic root of 1006221 is about 100.2069381373.

The spelling of 1006221 in words is "one million, six thousand, two hundred twenty-one".