1321223 has 4 divisors (see below), whose sum is σ = 1398960. Its totient is φ = 1243488.

The previous prime is 1321219. The next prime is 1321247. The reversal of 1321223 is 3221231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321223 - 2² = 1321219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321198 and 1321207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321213) 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, 38843 + ... + 38876.

It is an arithmetic number, because the mean of its divisors is an integer number (349740).

2^1321223 is an apocalyptic number.

1321223 is a deficient number, since it is larger than the sum of its proper divisors (77737).

1321223 is an equidigital number, since it uses as much as digits as its factorization.

1321223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77736.

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

The square root of 1321223 is about 1149.4446485151. Note that the first 3 decimals coincide. The cubic root of 1321223 is about 109.7299989669.

Adding to 1321223 its reverse (3221231), we get a palindrome (4542454).

The spelling of 1321223 in words is "one million, three hundred twenty-one thousand, two hundred twenty-three".