1233221 has 4 divisors (see below), whose sum is σ = 1345344. Its totient is φ = 1121100.

The previous prime is 1233209. The next prime is 1233241. The reversal of 1233221 is 1223321.

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: 1223321 = 11 ⋅111211.

It is a cyclic number.

It is not a de Polignac number, because 1233221 - 2¹⁸ = 971077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1233196 and 1233205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233241) 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, 56045 + ... + 56066.

It is an arithmetic number, because the mean of its divisors is an integer number (336336).

2^1233221 is an apocalyptic number.

1233221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1233221 is a deficient number, since it is larger than the sum of its proper divisors (112123).

1233221 is a wasteful number, since it uses less digits than its factorization.

1233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112122.

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

The square root of 1233221 is about 1110.5048401515. The cubic root of 1233221 is about 107.2375715281.

Adding to 1233221 its sum of digits (14), we get a triangular number (1233235 = T₁₅₇₀).

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

It can be divided in two parts, 12 and 33221, that added together give a palindrome (33233).

The spelling of 1233221 in words is "one million, two hundred thirty-three thousand, two hundred twenty-one".