1243240103 has 6 divisors (see below), whose sum is σ = 1446218136. Its totient is φ = 1065634332.

The previous prime is 1243240093. The next prime is 1243240111. The reversal of 1243240103 is 3010423421.

It is not a de Polignac number, because 1243240103 - 2¹⁸ = 1242977959 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 (1243240903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12686075 + ... + 12686172.

It is an arithmetic number, because the mean of its divisors is an integer number (241036356).

Almost surely, 2^1243240103 is an apocalyptic number.

1243240103 is a deficient number, since it is larger than the sum of its proper divisors (202978033).

1243240103 is an equidigital number, since it uses as much as digits as its factorization.

1243240103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25372261 (or 25372254 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1243240103 is about 35259.6100800902. The cubic root of 1243240103 is about 1075.2719998217.

Adding to 1243240103 its reverse (3010423421), we get a palindrome (4253663524).

The spelling of 1243240103 in words is "one billion, two hundred forty-three million, two hundred forty thousand, one hundred three".