1140221 has 4 divisors (see below), whose sum is σ = 1145472. Its totient is φ = 1134972.

The previous prime is 1140203. The next prime is 1140233. The reversal of 1140221 is 1220411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1140221 - 2⁶ = 1140157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140281) 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, 2285 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (286368).

2^1140221 is an apocalyptic number.

It is an amenable number.

1140221 is a deficient number, since it is larger than the sum of its proper divisors (5251).

1140221 is an equidigital number, since it uses as much as digits as its factorization.

1140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1140221 is about 1067.8113129200. The cubic root of 1140221 is about 104.4711427229.

Adding to 1140221 its reverse (1220411), we get a palindrome (2360632).

The spelling of 1140221 in words is "one million, one hundred forty thousand, two hundred twenty-one".