6857985 has 16 divisors (see below), whose sum is σ = 11124864. Its totient is φ = 3606912.

The previous prime is 6857971. The next prime is 6857999. The reversal of 6857985 is 5897586.

6857985 = T₁₂₃₀ + T₁₂₃₁ + ... + T₁₂₃₈.

It is an interprime number because it is at equal distance from previous prime (6857971) and next prime (6857999).

It is not a de Polignac number, because 6857985 - 2⁴ = 6857969 is a prime.

It is a super-3 number, since 3×6857985³ (a number of 21 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2037 + ... + 4226.

It is an arithmetic number, because the mean of its divisors is an integer number (695304).

Almost surely, 2^6857985 is an apocalyptic number.

It is an amenable number.

6857985 is a deficient number, since it is larger than the sum of its proper divisors (4266879).

6857985 is a wasteful number, since it uses less digits than its factorization.

6857985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6344.

The product of its digits is 604800, while the sum is 48.

The square root of 6857985 is about 2618.7754772030. The cubic root of 6857985 is about 189.9906274232.

The spelling of 6857985 in words is "six million, eight hundred fifty-seven thousand, nine hundred eighty-five".