6742809 has 12 divisors (see below), whose sum is σ = 9776676. Its totient is φ = 4478112.

The previous prime is 6742807. The next prime is 6742817. The reversal of 6742809 is 9082476.

It can be written as a sum of positive squares in 2 ways, for example, as 4928400 + 1814409 = 2220^2 + 1347^2 .

It is not a de Polignac number, because 6742809 - 2¹ = 6742807 is a prime.

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

6742809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6742807) 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, 1359 + ... + 3915.

It is an arithmetic number, because the mean of its divisors is an integer number (814723).

Almost surely, 2^6742809 is an apocalyptic number.

It is an amenable number.

6742809 is a deficient number, since it is larger than the sum of its proper divisors (3033867).

6742809 is a wasteful number, since it uses less digits than its factorization.

6742809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856 (or 2853 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 6742809 is about 2596.6919339806. The cubic root of 6742809 is about 188.9210218434.

The spelling of 6742809 in words is "six million, seven hundred forty-two thousand, eight hundred nine".