6845857 has 4 divisors (see below), whose sum is σ = 6853140. Its totient is φ = 6838576.

The previous prime is 6845843. The next prime is 6845869. The reversal of 6845857 is 7585486.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7585486 = 2 ⋅3792743.

It can be written as a sum of positive squares in 2 ways, for example, as 80656 + 6765201 = 284^2 + 2601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6845857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6845807) 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, 1978 + ... + 4195.

It is an arithmetic number, because the mean of its divisors is an integer number (1713285).

Almost surely, 2^6845857 is an apocalyptic number.

It is an amenable number.

6845857 is a deficient number, since it is larger than the sum of its proper divisors (7283).

6845857 is a wasteful number, since it uses less digits than its factorization.

6845857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282.

The product of its digits is 268800, while the sum is 43.

The square root of 6845857 is about 2616.4588664835. The cubic root of 6845857 is about 189.8785650630.

The spelling of 6845857 in words is "six million, eight hundred forty-five thousand, eight hundred fifty-seven".