6857825 has 12 divisors (see below), whose sum is σ = 9158268. Its totient is φ = 5064000.

The previous prime is 6857821. The next prime is 6857831. The reversal of 6857825 is 5287586.

It can be written as a sum of positive squares in 6 ways, for example, as 1456849 + 5400976 = 1207^2 + 2324^2 .

It is not a de Polignac number, because 6857825 - 2² = 6857821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6857821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10226 + ... + 10875.

It is an arithmetic number, because the mean of its divisors is an integer number (763189).

Almost surely, 2^6857825 is an apocalyptic number.

6857825 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6857825 is a deficient number, since it is larger than the sum of its proper divisors (2300443).

6857825 is a wasteful number, since it uses less digits than its factorization.

6857825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21124 (or 21119 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 6857825 is about 2618.7449283960. The cubic root of 6857825 is about 189.9891498883.

The spelling of 6857825 in words is "six million, eight hundred fifty-seven thousand, eight hundred twenty-five".