6745209 has 16 divisors (see below), whose sum is σ = 10025280. Its totient is φ = 4008960.

The previous prime is 6745201. The next prime is 6745229. The reversal of 6745209 is 9025476.

It is not a de Polignac number, because 6745209 - 2³ = 6745201 is a prime.

It is a Curzon number.

It is a plaindrome in base 7.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 6745209.

It is not an unprimeable number, because it can be changed into a prime (6745201) 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, 2512 + ... + 4449.

It is an arithmetic number, because the mean of its divisors is an integer number (626580).

Almost surely, 2^6745209 is an apocalyptic number.

It is an amenable number.

6745209 is a deficient number, since it is larger than the sum of its proper divisors (3280071).

6745209 is a wasteful number, since it uses less digits than its factorization.

6745209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 6745209 is about 2597.1540193065. The cubic root of 6745209 is about 188.9434337031.

The spelling of 6745209 in words is "six million, seven hundred forty-five thousand, two hundred nine".