4248309 has 16 divisors (see below), whose sum is σ = 6168512. Its totient is φ = 2585088.

The previous prime is 4248287. The next prime is 4248319. The reversal of 4248309 is 9038424.

It is a happy number.

It is not a de Polignac number, because 4248309 - 2¹⁷ = 4117237 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4248319) 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 15 ways as a sum of consecutive naturals, for example, 3222 + ... + 4344.

It is an arithmetic number, because the mean of its divisors is an integer number (385532).

Almost surely, 2^4248309 is an apocalyptic number.

It is an amenable number.

4248309 is a deficient number, since it is larger than the sum of its proper divisors (1920203).

4248309 is a wasteful number, since it uses less digits than its factorization.

4248309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 4248309 is about 2061.1426442631. The cubic root of 4248309 is about 161.9591041412.

The spelling of 4248309 in words is "four million, two hundred forty-eight thousand, three hundred nine".