1200103 has 4 divisors (see below), whose sum is σ = 1238848. Its totient is φ = 1161360.

The previous prime is 1200083. The next prime is 1200109. The reversal of 1200103 is 3010021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200103 - 2⁹ = 1199591 is a prime.

It is a Duffinian number.

1200103 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200109) 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 3 ways as a sum of consecutive naturals, for example, 19326 + ... + 19387.

It is an arithmetic number, because the mean of its divisors is an integer number (309712).

2^1200103 is an apocalyptic number.

1200103 is a deficient number, since it is larger than the sum of its proper divisors (38745).

1200103 is an equidigital number, since it uses as much as digits as its factorization.

1200103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38744.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 1200103 is about 1095.4921268544. The cubic root of 1200103 is about 106.2688972155.

Adding to 1200103 its reverse (3010021), we get a palindrome (4210124).

The spelling of 1200103 in words is "one million, two hundred thousand, one hundred three".