1223603 has 2 divisors, whose sum is σ = 1223604. Its totient is φ = 1223602.

The previous prime is 1223591. The next prime is 1223633. The reversal of 1223603 is 3063221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223603 - 2⁴ = 1223587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1223633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611801 + 611802.

It is an arithmetic number, because the mean of its divisors is an integer number (611802).

2^1223603 is an apocalyptic number.

1223603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223603 is an equidigital number, since it uses as much as digits as its factorization.

1223603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1223603 is about 1106.1659007581. The cubic root of 1223603 is about 106.9580585031.

Adding to 1223603 its reverse (3063221), we get a palindrome (4286824).

The spelling of 1223603 in words is "one million, two hundred twenty-three thousand, six hundred three".