1242042203 has 2 divisors, whose sum is σ = 1242042204. Its totient is φ = 1242042202.

The previous prime is 1242042173. The next prime is 1242042271. The reversal of 1242042203 is 3022402421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242042203 - 2²⁰ = 1240993627 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242042283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621021101 + 621021102.

It is an arithmetic number, because the mean of its divisors is an integer number (621021102).

Almost surely, 2^1242042203 is an apocalyptic number.

1242042203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242042203 is an equidigital number, since it uses as much as digits as its factorization.

1242042203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1242042203 is about 35242.6191279820. The cubic root of 1242042203 is about 1074.9265363174.

Adding to 1242042203 its reverse (3022402421), we get a palindrome (4264444624).

The spelling of 1242042203 in words is "one billion, two hundred forty-two million, forty-two thousand, two hundred three".