6855129 has 6 divisors (see below), whose sum is σ = 9901866. Its totient is φ = 4570080.

The previous prime is 6855113. The next prime is 6855133. The reversal of 6855129 is 9215586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6734025 + 121104 = 2595^2 + 348^2 .

It is not a de Polignac number, because 6855129 - 2⁴ = 6855113 is a prime.

It is a Curzon number.

6855129 is a lucky number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 6855093 and 6855102.

It is not an unprimeable number, because it can be changed into a prime (6855139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 380832 + ... + 380849.

It is an arithmetic number, because the mean of its divisors is an integer number (1650311).

Almost surely, 2^6855129 is an apocalyptic number.

It is an amenable number.

6855129 is a deficient number, since it is larger than the sum of its proper divisors (3046737).

6855129 is a wasteful number, since it uses less digits than its factorization.

6855129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761687 (or 761684 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 6855129 is about 2618.2301273952. The cubic root of 6855129 is about 189.9642499681.

The spelling of 6855129 in words is "six million, eight hundred fifty-five thousand, one hundred twenty-nine".