1088221 has 4 divisors (see below), whose sum is σ = 1152252. Its totient is φ = 1024192.

The previous prime is 1088209. The next prime is 1088233. The reversal of 1088221 is 1228801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1228801 = 7 ⋅175543.

It is an interprime number because it is at equal distance from previous prime (1088209) and next prime (1088233).

It can be written as a sum of positive squares in 2 ways, for example, as 1020100 + 68121 = 1010^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 1088221 - 2⁷ = 1088093 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1088221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1088192 and 1088201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1088251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31990 + ... + 32023.

It is an arithmetic number, because the mean of its divisors is an integer number (288063).

2^1088221 is an apocalyptic number.

It is an amenable number.

1088221 is a deficient number, since it is larger than the sum of its proper divisors (64031).

1088221 is an equidigital number, since it uses as much as digits as its factorization.

1088221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64030.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1088221 is about 1043.1783164924. The cubic root of 1088221 is about 102.8582270425.

The spelling of 1088221 in words is "one million, eighty-eight thousand, two hundred twenty-one".