1242420103 has 2 divisors, whose sum is σ = 1242420104. Its totient is φ = 1242420102.

The previous prime is 1242420079. The next prime is 1242420119. The reversal of 1242420103 is 3010242421.

It is a strong prime.

It is an emirp because it is prime and its reverse (3010242421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242420103 - 2⁵ = 1242420071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242420143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621210051 + 621210052.

It is an arithmetic number, because the mean of its divisors is an integer number (621210052).

Almost surely, 2^1242420103 is an apocalyptic number.

1242420103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242420103 is an equidigital number, since it uses as much as digits as its factorization.

1242420103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1242420103 is about 35247.9801265264. The cubic root of 1242420103 is about 1075.0355432272.

Adding to 1242420103 its reverse (3010242421), we get a palindrome (4252662524).

The spelling of 1242420103 in words is "one billion, two hundred forty-two million, four hundred twenty thousand, one hundred three".