1242336239 has 2 divisors, whose sum is σ = 1242336240. Its totient is φ = 1242336238.

The previous prime is 1242336163. The next prime is 1242336241. The reversal of 1242336239 is 9326332421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242336239 - 2¹⁶ = 1242270703 is a prime.

Together with 1242336241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242336199 and 1242336208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242236239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621168119 + 621168120.

It is an arithmetic number, because the mean of its divisors is an integer number (621168120).

Almost surely, 2^1242336239 is an apocalyptic number.

1242336239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242336239 is an equidigital number, since it uses as much as digits as its factorization.

1242336239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 35.

The square root of 1242336239 is about 35246.7904779996. The cubic root of 1242336239 is about 1075.0113541977.

The spelling of 1242336239 in words is "one billion, two hundred forty-two million, three hundred thirty-six thousand, two hundred thirty-nine".