1117221 has 8 divisors (see below), whose sum is σ = 1702464. Its totient is φ = 638400.

The previous prime is 1117199. The next prime is 1117243. The reversal of 1117221 is 1227111.

It is an interprime number because it is at equal distance from previous prime (1117199) and next prime (1117243).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1117221 - 2¹⁴ = 1100837 is a prime.

1117221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1117221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26580 + ... + 26621.

It is an arithmetic number, because the mean of its divisors is an integer number (212808).

2^1117221 is an apocalyptic number.

It is an amenable number.

1117221 is a deficient number, since it is larger than the sum of its proper divisors (585243).

1117221 is an equidigital number, since it uses as much as digits as its factorization.

1117221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53211.

The product of its digits is 28, while the sum is 15.

The square root of 1117221 is about 1056.9867548839. The cubic root of 1117221 is about 103.7639183921.

Adding to 1117221 its product of digits (28), we get a square (1117249 = 1057²).

The spelling of 1117221 in words is "one million, one hundred seventeen thousand, two hundred twenty-one".