1201003 has 2 divisors, whose sum is σ = 1201004.
Its totient is φ = 1201002.
The previous prime is 1201001. The next prime is 1201019. The reversal of 1201003 is 3001021.
Adding to 1201003 its reverse (3001021), we get a palindrome (4202024).
It is a weak prime.
It is an emirp because it is prime and its reverse (3001021) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1201003 - 21 = 1201001 is a prime.
Together with 1201001, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (1201001) 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, 600501 + 600502.
It is an arithmetic number, because the mean of its divisors is an integer number (600502).
21201003 is an apocalyptic number.
1201003 is a deficient number, since it is larger than the sum of its proper divisors (1).
1201003 is an equidigital number, since it uses as much as digits as its factorization.
1201003 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 6, while the sum is 7.
The square root of 1201003 is about 1095.9028241591.
The cubic root of 1201003 is about 106.2954555218.
The spelling of 1201003 in words is "one million, two hundred one thousand, three".