1123221 has 16 divisors (see below), whose sum is σ = 1654848. Its totient is φ = 672000.

The previous prime is 1123219. The next prime is 1123231. The reversal of 1123221 is 1223211.

It is not a de Polignac number, because 1123221 - 2¹ = 1123219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123197 and 1123206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3165 + ... + 3501.

It is an arithmetic number, because the mean of its divisors is an integer number (103428).

2^1123221 is an apocalyptic number.

1123221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123221 is a deficient number, since it is larger than the sum of its proper divisors (531627).

1123221 is a wasteful number, since it uses less digits than its factorization.

1123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452.

The product of its digits is 24, while the sum is 12.

The square root of 1123221 is about 1059.8212113371. The cubic root of 1123221 is about 103.9493404653.

Adding to 1123221 its reverse (1223211), we get a palindrome (2346432).

It can be divided in two parts, 112 and 3221, that added together give a palindrome (3333).

The spelling of 1123221 in words is "one million, one hundred twenty-three thousand, two hundred twenty-one".