6805129 has 4 divisors (see below), whose sum is σ = 6814080. Its totient is φ = 6796180.

The previous prime is 6805121. The next prime is 6805157. The reversal of 6805129 is 9215086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9215086 = 2 ⋅4607543.

It is a cyclic number.

It is not a de Polignac number, because 6805129 - 2³ = 6805121 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6805129.

It is not an unprimeable number, because it can be changed into a prime (6805121) 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 3 ways as a sum of consecutive naturals, for example, 3217 + ... + 4894.

It is an arithmetic number, because the mean of its divisors is an integer number (1703520).

Almost surely, 2^6805129 is an apocalyptic number.

It is an amenable number.

6805129 is a deficient number, since it is larger than the sum of its proper divisors (8951).

6805129 is an equidigital number, since it uses as much as digits as its factorization.

6805129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8950.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 6805129 is about 2608.6642175642. The cubic root of 6805129 is about 189.5012681995.

The spelling of 6805129 in words is "six million, eight hundred five thousand, one hundred twenty-nine".