4249639 has 4 divisors (see below), whose sum is σ = 4273560. Its totient is φ = 4225720.

The previous prime is 4249633. The next prime is 4249669. The reversal of 4249639 is 9369424.

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 4249639 - 2¹⁵ = 4216871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4249598 and 4249607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4249633) 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, 11692 + ... + 12049.

It is an arithmetic number, because the mean of its divisors is an integer number (1068390).

Almost surely, 2^4249639 is an apocalyptic number.

4249639 is a deficient number, since it is larger than the sum of its proper divisors (23921).

4249639 is a wasteful number, since it uses less digits than its factorization.

4249639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23920.

The product of its digits is 46656, while the sum is 37.

The square root of 4249639 is about 2061.4652555888. The cubic root of 4249639 is about 161.9760036601.

The spelling of 4249639 in words is "four million, two hundred forty-nine thousand, six hundred thirty-nine".