1080221 has 6 divisors (see below), whose sum is σ = 1123290. Its totient is φ = 1037568.

The previous prime is 1080217. The next prime is 1080223. The reversal of 1080221 is 1220801.

It can be written as a sum of positive squares in 3 ways, for example, as 19321 + 1060900 = 139^2 + 1030^2 .

It is not a de Polignac number, because 1080221 - 2² = 1080217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1080196 and 1080205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5501 + ... + 5693.

It is an arithmetic number, because the mean of its divisors is an integer number (187215).

2^1080221 is an apocalyptic number.

It is an amenable number.

1080221 is a deficient number, since it is larger than the sum of its proper divisors (43069).

1080221 is an frugal number, since it uses more digits than its factorization.

1080221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1080221 is about 1039.3368077770. The cubic root of 1080221 is about 102.6055545582.

The spelling of 1080221 in words is "one million, eighty thousand, two hundred twenty-one".