4248639 has 16 divisors (see below), whose sum is σ = 6415200. Its totient is φ = 2778048.

The previous prime is 4248631. The next prime is 4248661. The reversal of 4248639 is 9368424.

It is a happy number.

It is not a de Polignac number, because 4248639 - 2³ = 4248631 is a prime.

4248639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4248631) 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, 54 + ... + 2915.

It is an arithmetic number, because the mean of its divisors is an integer number (400950).

Almost surely, 2^4248639 is an apocalyptic number.

4248639 is a deficient number, since it is larger than the sum of its proper divisors (2166561).

4248639 is a wasteful number, since it uses less digits than its factorization.

4248639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031 (or 3025 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 4248639 is about 2061.2226953922. Note that the first 3 decimals coincide. The cubic root of 4248639 is about 161.9632975839.

The spelling of 4248639 in words is "four million, two hundred forty-eight thousand, six hundred thirty-nine".