1224021 has 8 divisors (see below), whose sum is σ = 1666944. Its totient is φ = 798560.

The previous prime is 1223993. The next prime is 1224029. The reversal of 1224021 is 1204221.

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 1224021 - 2¹⁹ = 699733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223988 and 1224006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4200 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (208368).

2^1224021 is an apocalyptic number.

It is an amenable number.

1224021 is a deficient number, since it is larger than the sum of its proper divisors (442923).

1224021 is an equidigital number, since it uses as much as digits as its factorization.

1224021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1224021 is about 1106.3548255420. The cubic root of 1224021 is about 106.9702365757.

Adding to 1224021 its reverse (1204221), we get a palindrome (2428242).

The spelling of 1224021 in words is "one million, two hundred twenty-four thousand, twenty-one".