1323021 has 12 divisors (see below), whose sum is σ = 2024096. Its totient is φ = 753000.

The previous prime is 1323017. The next prime is 1323041. The reversal of 1323021 is 1203231.

It is a happy number.

It is not a de Polignac number, because 1323021 - 2² = 1323017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1322988 and 1323006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5146 + ... + 5396.

2^1323021 is an apocalyptic number.

It is an amenable number.

1323021 is a deficient number, since it is larger than the sum of its proper divisors (701075).

1323021 is an frugal number, since it uses more digits than its factorization.

1323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 261 counting only the distinct ones).

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

The square root of 1323021 is about 1150.2264994339. The cubic root of 1323021 is about 109.7797521398.

Adding to 1323021 its reverse (1203231), we get a palindrome (2526252).

The spelling of 1323021 in words is "one million, three hundred twenty-three thousand, twenty-one".