6745509 has 12 divisors (see below), whose sum is σ = 10167456. Its totient is φ = 4301352.

The previous prime is 6745499. The next prime is 6745511. The reversal of 6745509 is 9055476.

It is not a de Polignac number, because 6745509 - 2¹³ = 6737317 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6745559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16087 + ... + 16500.

It is an arithmetic number, because the mean of its divisors is an integer number (847288).

Almost surely, 2^6745509 is an apocalyptic number.

6745509 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

6745509 is a deficient number, since it is larger than the sum of its proper divisors (3421947).

6745509 is a wasteful number, since it uses less digits than its factorization.

6745509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32616 (or 32613 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 6745509 is about 2597.2117741917. The cubic root of 6745509 is about 188.9462348117.

The spelling of 6745509 in words is "six million, seven hundred forty-five thousand, five hundred nine".