1221033 has 16 divisors (see below), whose sum is σ = 1794816. Its totient is φ = 732240.

The previous prime is 1221029. The next prime is 1221049. The reversal of 1221033 is 3301221.

It is a happy number.

It is not a de Polignac number, because 1221033 - 2² = 1221029 is a prime.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1221083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5266 + ... + 5492.

It is an arithmetic number, because the mean of its divisors is an integer number (112176).

2^1221033 is an apocalyptic number.

It is an amenable number.

1221033 is a deficient number, since it is larger than the sum of its proper divisors (573783).

1221033 is a wasteful number, since it uses less digits than its factorization.

1221033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1221033 is about 1105.0036199036. The cubic root of 1221033 is about 106.8831227368.

Adding to 1221033 its reverse (3301221), we get a palindrome (4522254).

The spelling of 1221033 in words is "one million, two hundred twenty-one thousand, thirty-three".