6725509 has 8 divisors (see below), whose sum is σ = 7711808. Its totient is φ = 5745600.

The previous prime is 6725497. The next prime is 6725513. The reversal of 6725509 is 9055276.

6725509 = T₆ + T₇ + ... + T₃₄₂.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6725509 - 2¹¹ = 6723461 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 (6725519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 934 + ... + 3784.

It is an arithmetic number, because the mean of its divisors is an integer number (963976).

Almost surely, 2^6725509 is an apocalyptic number.

It is an amenable number.

6725509 is a deficient number, since it is larger than the sum of its proper divisors (986299).

6725509 is a wasteful number, since it uses less digits than its factorization.

6725509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3195.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 6725509 is about 2593.3586331242. The cubic root of 6725509 is about 188.7593121438.

Adding to 6725509 its product of nonzero digits (18900), we get a square (6744409 = 2597²).

The spelling of 6725509 in words is "six million, seven hundred twenty-five thousand, five hundred nine".