1100203 has 4 divisors (see below), whose sum is σ = 1184848. Its totient is φ = 1015560.

The previous prime is 1100179. The next prime is 1100213. The reversal of 1100203 is 3020011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3020011 = 461 ⋅6551.

It is not a de Polignac number, because 1100203 - 2⁵ = 1100171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42303 + ... + 42328.

It is an arithmetic number, because the mean of its divisors is an integer number (296212).

2^1100203 is an apocalyptic number.

1100203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1100203 is a deficient number, since it is larger than the sum of its proper divisors (84645).

1100203 is an equidigital number, since it uses as much as digits as its factorization.

1100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84644.

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

The square root of 1100203 is about 1048.9056201585. The cubic root of 1100203 is about 103.2343612418.

Adding to 1100203 its reverse (3020011), we get a palindrome (4120214).

The spelling of 1100203 in words is "one million, one hundred thousand, two hundred three".