1205903 has 2 divisors, whose sum is σ = 1205904. Its totient is φ = 1205902.

The previous prime is 1205899. The next prime is 1205921. The reversal of 1205903 is 3095021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1205903 - 2² = 1205899 is a prime.

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1207903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602951 + 602952.

It is an arithmetic number, because the mean of its divisors is an integer number (602952).

2^1205903 is an apocalyptic number.

1205903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205903 is an equidigital number, since it uses as much as digits as its factorization.

1205903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1205903 is about 1098.1361482075. The cubic root of 1205903 is about 106.4398184677.

The spelling of 1205903 in words is "one million, two hundred five thousand, nine hundred three".