4242839 has 2 divisors, whose sum is σ = 4242840. Its totient is φ = 4242838.

The previous prime is 4242829. The next prime is 4242841. The reversal of 4242839 is 9382424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4242839 is a prime.

It is a Sophie Germain prime.

Together with 4242841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4242829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121419 + 2121420.

It is an arithmetic number, because the mean of its divisors is an integer number (2121420).

Almost surely, 2^4242839 is an apocalyptic number.

4242839 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242839 is an equidigital number, since it uses as much as digits as its factorization.

4242839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 4242839 is about 2059.8152829805. The cubic root of 4242839 is about 161.8895629976.

The spelling of 4242839 in words is "four million, two hundred forty-two thousand, eight hundred thirty-nine".