4243239 has 64 divisors (see below), whose sum is σ = 8494080. Its totient is φ = 2021760.

The previous prime is 4243237. The next prime is 4243243. The reversal of 4243239 is 9323424.

It is a happy number.

4243239 is a `hidden beast` number, since 424 + 3 + 239 = 666.

It is not a de Polignac number, because 4243239 - 2¹ = 4243237 is a prime.

It is a super-2 number, since 2×4243239² = 36010154422242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 4³ + 2⁹ + 4³ + 3⁹ + 2²¹ + 3¹³ + 9⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243237) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26949 + ... + 27105.

It is an arithmetic number, because the mean of its divisors is an integer number (132720).

Almost surely, 2^4243239 is an apocalyptic number.

4243239 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

4243239 is a wasteful number, since it uses less digits than its factorization.

4243239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 191 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 4243239 is about 2059.9123767772. The cubic root of 4243239 is about 161.8946502981.

It can be divided in two parts, 424 and 3239, that added together give a palindrome (3663).

The spelling of 4243239 in words is "four million, two hundred forty-three thousand, two hundred thirty-nine".