6840129 has 8 divisors (see below), whose sum is σ = 9133632. Its totient is φ = 4553360.

The previous prime is 6840109. The next prime is 6840157. The reversal of 6840129 is 9210486.

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

It is a cyclic number.

It is not a de Polignac number, because 6840129 - 2⁸ = 6839873 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6840096 and 6840105.

It is not an unprimeable number, because it can be changed into a prime (6840109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1612 + ... + 4034.

It is an arithmetic number, because the mean of its divisors is an integer number (1141704).

Almost surely, 2^6840129 is an apocalyptic number.

It is an amenable number.

6840129 is a deficient number, since it is larger than the sum of its proper divisors (2293503).

6840129 is a wasteful number, since it uses less digits than its factorization.

6840129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 6840129 is about 2615.3640281995. The cubic root of 6840129 is about 189.8255924936.

The spelling of 6840129 in words is "six million, eight hundred forty thousand, one hundred twenty-nine".