6878257 has 4 divisors (see below), whose sum is σ = 6889536. Its totient is φ = 6866980.

The previous prime is 6878233. The next prime is 6878269. The reversal of 6878257 is 7528786.

It is a happy number.

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: 7528786 = 2 ⋅3764393.

It is a cyclic number.

It is not a de Polignac number, because 6878257 - 2⁷ = 6878129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6878657) 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 3 ways as a sum of consecutive naturals, for example, 4669 + ... + 5962.

It is an arithmetic number, because the mean of its divisors is an integer number (1722384).

Almost surely, 2^6878257 is an apocalyptic number.

It is an amenable number.

6878257 is a deficient number, since it is larger than the sum of its proper divisors (11279).

6878257 is a wasteful number, since it uses less digits than its factorization.

6878257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11278.

The product of its digits is 188160, while the sum is 43.

The square root of 6878257 is about 2622.6431324143. The cubic root of 6878257 is about 190.1776454883.

The spelling of 6878257 in words is "six million, eight hundred seventy-eight thousand, two hundred fifty-seven".