1203221 has 2 divisors, whose sum is σ = 1203222. Its totient is φ = 1203220.

The previous prime is 1203217. The next prime is 1203229. The reversal of 1203221 is 1223021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 579121 = 790^2 + 761^2 .

It is an emirp because it is prime and its reverse (1223021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1203221 - 2² = 1203217 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 (1203229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601610 + 601611.

It is an arithmetic number, because the mean of its divisors is an integer number (601611).

2^1203221 is an apocalyptic number.

It is an amenable number.

1203221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203221 is an equidigital number, since it uses as much as digits as its factorization.

1203221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1203221 is about 1096.9143084125. The cubic root of 1203221 is about 106.3608503998.

Adding to 1203221 its reverse (1223021), we get a palindrome (2426242).

The spelling of 1203221 in words is "one million, two hundred three thousand, two hundred twenty-one".