6857007 has 4 divisors (see below), whose sum is σ = 9142680. Its totient is φ = 4571336.

The previous prime is 6857003. The next prime is 6857023. The reversal of 6857007 is 7007586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6857007 - 2² = 6857003 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857003) 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, 1142832 + ... + 1142837.

It is an arithmetic number, because the mean of its divisors is an integer number (2285670).

Almost surely, 2^6857007 is an apocalyptic number.

6857007 is a deficient number, since it is larger than the sum of its proper divisors (2285673).

6857007 is a wasteful number, since it uses less digits than its factorization.

6857007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285672.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 6857007 is about 2618.5887420517. The cubic root of 6857007 is about 189.9815956319.

It can be divided in two parts, 68 and 57007, that added together give a palindrome (57075).

The spelling of 6857007 in words is "six million, eight hundred fifty-seven thousand, seven".