6857111 has 4 divisors (see below), whose sum is σ = 6911232. Its totient is φ = 6802992.

The previous prime is 6857101. The next prime is 6857117. The reversal of 6857111 is 1117586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1117586 = 2 ⋅558793.

It is a cyclic number.

It is not a de Polignac number, because 6857111 - 2⁶ = 6857047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857117) 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, 26870 + ... + 27123.

It is an arithmetic number, because the mean of its divisors is an integer number (1727808).

Almost surely, 2^6857111 is an apocalyptic number.

6857111 is a deficient number, since it is larger than the sum of its proper divisors (54121).

6857111 is a wasteful number, since it uses less digits than its factorization.

6857111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54120.

The product of its digits is 1680, while the sum is 29.

The square root of 6857111 is about 2618.6086000012. The cubic root of 6857111 is about 189.9825561086.

The spelling of 6857111 in words is "six million, eight hundred fifty-seven thousand, one hundred eleven".