4243839 has 4 divisors (see below), whose sum is σ = 5658456. Its totient is φ = 2829224.

The previous prime is 4243823. The next prime is 4243861. The reversal of 4243839 is 9383424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4243839 - 2⁴ = 4243823 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 2⁷ + 4¹¹ + 3 + 8⁵ + 3⁵ + 9 .

It is a D-number.

4243839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707304 + ... + 707309.

It is an arithmetic number, because the mean of its divisors is an integer number (1414614).

Almost surely, 2^4243839 is an apocalyptic number.

4243839 is a deficient number, since it is larger than the sum of its proper divisors (1414617).

4243839 is a wasteful number, since it uses less digits than its factorization.

4243839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414616.

The product of its digits is 20736, while the sum is 33.

The square root of 4243839 is about 2060.0580088920. The cubic root of 4243839 is about 161.9022806493.

The spelling of 4243839 in words is "four million, two hundred forty-three thousand, eight hundred thirty-nine".