1200503 has 4 divisors (see below), whose sum is σ = 1223208. Its totient is φ = 1177800.

The previous prime is 1200499. The next prime is 1200509. The reversal of 1200503 is 3050021.

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 1200503 - 2² = 1200499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200509) 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 in 3 ways as a sum of consecutive naturals, for example, 11273 + ... + 11378.

It is an arithmetic number, because the mean of its divisors is an integer number (305802).

2^1200503 is an apocalyptic number.

1200503 is a deficient number, since it is larger than the sum of its proper divisors (22705).

1200503 is an equidigital number, since it uses as much as digits as its factorization.

1200503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22704.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 1200503 is about 1095.6746779953. The cubic root of 1200503 is about 106.2807025459.

Adding to 1200503 its reverse (3050021), we get a palindrome (4250524).

The spelling of 1200503 in words is "one million, two hundred thousand, five hundred three".