1023221 has 2 divisors, whose sum is σ = 1023222. Its totient is φ = 1023220.

The previous prime is 1023203. The next prime is 1023227. The reversal of 1023221 is 1223201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 148996 = 935^2 + 386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511610 + 511611.

It is an arithmetic number, because the mean of its divisors is an integer number (511611).

2^1023221 is an apocalyptic number.

It is an amenable number.

1023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023221 is an equidigital number, since it uses as much as digits as its factorization.

1023221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1023221 is about 1011.5438695380. The cubic root of 1023221 is about 100.7681181716.

Adding to 1023221 its reverse (1223201), we get a palindrome (2246422).

The spelling of 1023221 in words is "one million, twenty-three thousand, two hundred twenty-one".