1221233 has 4 divisors (see below), whose sum is σ = 1315188. Its totient is φ = 1127280.

The previous prime is 1221223. The next prime is 1221239. The reversal of 1221233 is 3321221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3321221 = 241 ⋅13781.

It can be written as a sum of positive squares in 2 ways, for example, as 237169 + 984064 = 487^2 + 992^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221233 - 2¹⁶ = 1155697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221239) 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, 46958 + ... + 46983.

It is an arithmetic number, because the mean of its divisors is an integer number (328797).

2^1221233 is an apocalyptic number.

1221233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1221233 is a deficient number, since it is larger than the sum of its proper divisors (93955).

1221233 is an equidigital number, since it uses as much as digits as its factorization.

1221233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93954.

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

The square root of 1221233 is about 1105.0941136392. The cubic root of 1221233 is about 106.8889580849. Note that the first 3 decimals are identical.

Adding to 1221233 its reverse (3321221), we get a palindrome (4542454).

It can be divided in two parts, 122 and 1233, that multiplied together give a triangular number (150426 = T₅₄₈).

The spelling of 1221233 in words is "one million, two hundred twenty-one thousand, two hundred thirty-three".