1208221 has 4 divisors (see below), whose sum is σ = 1380832. Its totient is φ = 1035612.

The previous prime is 1208219. The next prime is 1208237. The reversal of 1208221 is 1228021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1208221 - 2¹ = 1208219 is a prime.

It is a Duffinian number.

1208221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1208195 and 1208204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208021) 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 3 ways as a sum of consecutive naturals, for example, 86295 + ... + 86308.

It is an arithmetic number, because the mean of its divisors is an integer number (345208).

2^1208221 is an apocalyptic number.

It is an amenable number.

1208221 is a deficient number, since it is larger than the sum of its proper divisors (172611).

1208221 is an equidigital number, since it uses as much as digits as its factorization.

1208221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172610.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1208221 is about 1099.1910661937. The cubic root of 1208221 is about 106.5079747458.

The spelling of 1208221 in words is "one million, two hundred eight thousand, two hundred twenty-one".