4243939 has 8 divisors (see below), whose sum is σ = 4949600. Its totient is φ = 3637368.

The previous prime is 4243933. The next prime is 4243949. The reversal of 4243939 is 9393424.

It is not a de Polignac number, because 4243939 - 2⁹ = 4243427 is a prime.

It is a super-2 number, since 2×4243939² = 36022036471442, which contains 22 as substring.

It is a Duffinian number.

4243939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4243933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5844 + ... + 6529.

It is an arithmetic number, because the mean of its divisors is an integer number (618700).

Almost surely, 2^4243939 is an apocalyptic number.

4243939 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

4243939 is a deficient number, since it is larger than the sum of its proper divisors (705661).

4243939 is an equidigital number, since it uses as much as digits as its factorization.

4243939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12394 (or 12380 counting only the distinct ones).

The product of its digits is 23328, while the sum is 34.

The square root of 4243939 is about 2060.0822799102. The cubic root of 4243939 is about 161.9035523046.

The spelling of 4243939 in words is "four million, two hundred forty-three thousand, nine hundred thirty-nine".