4242539 has 4 divisors (see below), whose sum is σ = 4848624. Its totient is φ = 3636456.

The previous prime is 4242523. The next prime is 4242547. The reversal of 4242539 is 9352424.

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 4242539 - 2⁴ = 4242523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4242569) 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, 303032 + ... + 303045.

It is an arithmetic number, because the mean of its divisors is an integer number (1212156).

Almost surely, 2^4242539 is an apocalyptic number.

4242539 is a deficient number, since it is larger than the sum of its proper divisors (606085).

4242539 is an equidigital number, since it uses as much as digits as its factorization.

4242539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606084.

The product of its digits is 8640, while the sum is 29.

The square root of 4242539 is about 2059.7424596294. The cubic root of 4242539 is about 161.8857473125.

The spelling of 4242539 in words is "four million, two hundred forty-two thousand, five hundred thirty-nine".