1243140103 has 2 divisors, whose sum is σ = 1243140104. Its totient is φ = 1243140102.

The previous prime is 1243140077. The next prime is 1243140109. The reversal of 1243140103 is 3010413421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243140103 - 2²¹ = 1241042951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243140109) 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, 621570051 + 621570052.

It is an arithmetic number, because the mean of its divisors is an integer number (621570052).

Almost surely, 2^1243140103 is an apocalyptic number.

1243140103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243140103 is an equidigital number, since it uses as much as digits as its factorization.

1243140103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1243140103 is about 35258.1919984562. The cubic root of 1243140103 is about 1075.2431692193.

Adding to 1243140103 its reverse (3010413421), we get a palindrome (4253553524).

The spelling of 1243140103 in words is "one billion, two hundred forty-three million, one hundred forty thousand, one hundred three".