4242509 has 4 divisors (see below), whose sum is σ = 4341216. Its totient is φ = 4143804.

The previous prime is 4242473. The next prime is 4242517. The reversal of 4242509 is 9052424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4242509 - 2⁸ = 4242253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4242569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49289 + ... + 49374.

It is an arithmetic number, because the mean of its divisors is an integer number (1085304).

Almost surely, 2^4242509 is an apocalyptic number.

It is an amenable number.

4242509 is a deficient number, since it is larger than the sum of its proper divisors (98707).

4242509 is an equidigital number, since it uses as much as digits as its factorization.

4242509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98706.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4242509 is about 2059.7351771526. The cubic root of 4242509 is about 161.8853657340.

The spelling of 4242509 in words is "four million, two hundred forty-two thousand, five hundred nine".