1223321 has 4 divisors (see below), whose sum is σ = 1334544. Its totient is φ = 1112100.

The previous prime is 1223311. The next prime is 1223323. The reversal of 1223321 is 1233221.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1233221 = 11 ⋅112111.

It is a de Polignac number, because none of the positive numbers 2^k-1223321 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1223296 and 1223305.

It is not an unprimeable number, because it can be changed into a prime (1223323) 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, 55595 + ... + 55616.

It is an arithmetic number, because the mean of its divisors is an integer number (333636).

2^1223321 is an apocalyptic number.

1223321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223321 is a deficient number, since it is larger than the sum of its proper divisors (111223).

1223321 is a wasteful number, since it uses less digits than its factorization.

1223321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111222.

The product of its digits is 72, while the sum is 14.

The square root of 1223321 is about 1106.0384260956. The cubic root of 1223321 is about 106.9498411075.

Adding to 1223321 its reverse (1233221), we get a palindrome (2456542).

It can be divided in two parts, 122 and 3321, that added together give a palindrome (3443).

The spelling of 1223321 in words is "one million, two hundred twenty-three thousand, three hundred twenty-one".