4248509 has 4 divisors (see below), whose sum is σ = 4270716. Its totient is φ = 4226304.

The previous prime is 4248481. The next prime is 4248539. The reversal of 4248509 is 9058424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1968409 + 2280100 = 1403^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 4248509 - 2⁸ = 4248253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4248539) 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, 10814 + ... + 11199.

It is an arithmetic number, because the mean of its divisors is an integer number (1067679).

Almost surely, 2^4248509 is an apocalyptic number.

It is an amenable number.

4248509 is a deficient number, since it is larger than the sum of its proper divisors (22207).

4248509 is a wasteful number, since it uses less digits than its factorization.

4248509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22206.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 4248509 is about 2061.1911604701. The cubic root of 4248509 is about 161.9616456476.

The spelling of 4248509 in words is "four million, two hundred forty-eight thousand, five hundred nine".