1003403 has 8 divisors (see below), whose sum is σ = 1054272. Its totient is φ = 953856.

The previous prime is 1003397. The next prime is 1003411. The reversal of 1003403 is 3043001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1003403 - 2¹² = 999307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003433) 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 7 ways as a sum of consecutive naturals, for example, 1451 + ... + 2027.

It is an arithmetic number, because the mean of its divisors is an integer number (131784).

2^1003403 is an apocalyptic number.

1003403 is a deficient number, since it is larger than the sum of its proper divisors (50869).

1003403 is an equidigital number, since it uses as much as digits as its factorization.

1003403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

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

The square root of 1003403 is about 1001.7000549067. The cubic root of 1003403 is about 100.1133049048.

Adding to 1003403 its reverse (3043001), we get a palindrome (4046404).

The spelling of 1003403 in words is "one million, three thousand, four hundred three".