1023321 has 16 divisors (see below), whose sum is σ = 1547840. Its totient is φ = 596160.

The previous prime is 1023317. The next prime is 1023329. The reversal of 1023321 is 1233201.

It is a happy number.

It is not a de Polignac number, because 1023321 - 2² = 1023317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023297 and 1023306.

It is not an unprimeable number, because it can be changed into a prime (1023329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51 + ... + 1431.

It is an arithmetic number, because the mean of its divisors is an integer number (96740).

2^1023321 is an apocalyptic number.

It is an amenable number.

1023321 is a deficient number, since it is larger than the sum of its proper divisors (524519).

1023321 is a wasteful number, since it uses less digits than its factorization.

1023321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416.

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

The square root of 1023321 is about 1011.5932977239. The cubic root of 1023321 is about 100.7714007742.

Adding to 1023321 its reverse (1233201), we get a palindrome (2256522).

The spelling of 1023321 in words is "one million, twenty-three thousand, three hundred twenty-one".