1222321 has 8 divisors (see below), whose sum is σ = 1279080. Its totient is φ = 1166592.

The previous prime is 1222307. The next prime is 1222373. The reversal of 1222321 is 1232221.

It can be written as a sum of positive squares in 4 ways, for example, as 12321 + 1210000 = 111^2 + 1100^2 .

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 1222321 - 2¹⁵ = 1189553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226321) 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, 3091 + ... + 3463.

It is an arithmetic number, because the mean of its divisors is an integer number (159885).

2^1222321 is an apocalyptic number.

It is an amenable number.

1222321 is a deficient number, since it is larger than the sum of its proper divisors (56759).

1222321 is a wasteful number, since it uses less digits than its factorization.

1222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515.

The product of its digits is 48, while the sum is 13.

The square root of 1222321 is about 1105.5862698134. The cubic root of 1222321 is about 106.9206912233.

Adding to 1222321 its reverse (1232221), we get a palindrome (2454542).

The spelling of 1222321 in words is "one million, two hundred twenty-two thousand, three hundred twenty-one".