6249639 has 16 divisors (see below), whose sum is σ = 9141120. Its totient is φ = 3766560.

The previous prime is 6249619. The next prime is 6249647. The reversal of 6249639 is 9369426.

It is a happy number.

6249639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6249639 - 2⁹ = 6249127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6249597 and 6249606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6249619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7144 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (571320).

Almost surely, 2^6249639 is an apocalyptic number.

6249639 is a deficient number, since it is larger than the sum of its proper divisors (2891481).

6249639 is a wasteful number, since it uses less digits than its factorization.

6249639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070.

The product of its digits is 69984, while the sum is 39.

The square root of 6249639 is about 2499.9277989574. The cubic root of 6249639 is about 184.1980283694.

The spelling of 6249639 in words is "six million, two hundred forty-nine thousand, six hundred thirty-nine".