1122221 has 8 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 1048000.

The previous prime is 1122181. The next prime is 1122227. The reversal of 1122221 is 1222211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1122221 - 2⁶ = 1122157 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4136 + ... + 4398.

It is an arithmetic number, because the mean of its divisors is an integer number (149688).

2^1122221 is an apocalyptic number.

It is an amenable number.

1122221 is a deficient number, since it is larger than the sum of its proper divisors (75283).

1122221 is a wasteful number, since it uses less digits than its factorization.

1122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531.

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

The square root of 1122221 is about 1059.3493285975. The cubic root of 1122221 is about 103.9184827195.

Adding to 1122221 its reverse (1222211), we get a palindrome (2344432).

The spelling of 1122221 in words is "one million, one hundred twenty-two thousand, two hundred twenty-one".