1130221 has 4 divisors (see below), whose sum is σ = 1140700. Its totient is φ = 1119744.

The previous prime is 1130191. The next prime is 1130237. The reversal of 1130221 is 1220311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 373321 + 756900 = 611^2 + 870^2 .

It is a 5-Lehmer number, since φ(1130221) divides (1130221-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 1130221 - 2¹³ = 1122029 is a prime.

It is a Duffinian number.

1130221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1130198 and 1130207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1130251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5076 + ... + 5293.

It is an arithmetic number, because the mean of its divisors is an integer number (285175).

2^1130221 is an apocalyptic number.

It is an amenable number.

1130221 is a deficient number, since it is larger than the sum of its proper divisors (10479).

1130221 is a wasteful number, since it uses less digits than its factorization.

1130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10478.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1130221 is about 1063.1185258474. The cubic root of 1130221 is about 104.1648335322.

Adding to 1130221 its reverse (1220311), we get a palindrome (2350532).

The spelling of 1130221 in words is "one million, one hundred thirty thousand, two hundred twenty-one".