1220303 has 4 divisors (see below), whose sum is σ = 1394640. Its totient is φ = 1045968.

The previous prime is 1220257. The next prime is 1220309. The reversal of 1220303 is 3030221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1220303 - 2⁶ = 1220239 is a prime.

It is a Duffinian number.

1220303 is a modest number, since divided by 303 gives 122 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220309) 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, 87158 + ... + 87171.

It is an arithmetic number, because the mean of its divisors is an integer number (348660).

2^1220303 is an apocalyptic number.

1220303 is a deficient number, since it is larger than the sum of its proper divisors (174337).

1220303 is an equidigital number, since it uses as much as digits as its factorization.

1220303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174336.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 1220303 is about 1104.6732548586. The cubic root of 1220303 is about 106.8618183075.

Adding to 1220303 its reverse (3030221), we get a palindrome (4250524).

The spelling of 1220303 in words is "one million, two hundred twenty thousand, three hundred three".