1203903 has 20 divisors (see below), whose sum is σ = 1829520. Its totient is φ = 788832.

The previous prime is 1203901. The next prime is 1203913. The reversal of 1203903 is 3093021.

It is not a de Polignac number, because 1203903 - 2¹ = 1203901 is a prime.

1203903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203901) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7126 + ... + 7292.

It is an arithmetic number, because the mean of its divisors is an integer number (91476).

2^1203903 is an apocalyptic number.

1203903 is a deficient number, since it is larger than the sum of its proper divisors (625617).

1203903 is an equidigital number, since it uses as much as digits as its factorization.

1203903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1203903 is about 1097.2251364237. The cubic root of 1203903 is about 106.3809421366.

Adding to 1203903 its reverse (3093021), we get a palindrome (4296924).

The spelling of 1203903 in words is "one million, two hundred three thousand, nine hundred three".