1116221 has 4 divisors (see below), whose sum is σ = 1135200. Its totient is φ = 1097244.

The previous prime is 1116209. The next prime is 1116223. The reversal of 1116221 is 1226111.

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 a de Polignac number, because none of the positive numbers 2^k-1116221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1116196 and 1116205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9401 + ... + 9518.

It is an arithmetic number, because the mean of its divisors is an integer number (283800).

2^1116221 is an apocalyptic number.

It is an amenable number.

1116221 is a deficient number, since it is larger than the sum of its proper divisors (18979).

1116221 is an equidigital number, since it uses as much as digits as its factorization.

1116221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18978.

The product of its digits is 24, while the sum is 14.

The square root of 1116221 is about 1056.5136061594. The cubic root of 1116221 is about 103.7329502152.

The spelling of 1116221 in words is "one million, one hundred sixteen thousand, two hundred twenty-one".