1242423079 has 2 divisors, whose sum is σ = 1242423080. Its totient is φ = 1242423078.

The previous prime is 1242423073. The next prime is 1242423137. The reversal of 1242423079 is 9703242421.

It is a weak prime.

It is an emirp because it is prime and its reverse (9703242421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242423079 - 2⁵ = 1242423047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242423073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621211539 + 621211540.

It is an arithmetic number, because the mean of its divisors is an integer number (621211540).

Almost surely, 2^1242423079 is an apocalyptic number.

1242423079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242423079 is an equidigital number, since it uses as much as digits as its factorization.

1242423079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1242423079 is about 35248.0223416861. The cubic root of 1242423079 is about 1075.0364015797.

The spelling of 1242423079 in words is "one billion, two hundred forty-two million, four hundred twenty-three thousand, seventy-nine".