6856381 has 8 divisors (see below), whose sum is σ = 7930944. Its totient is φ = 5805600.

The previous prime is 6856357. The next prime is 6856387. The reversal of 6856381 is 1836586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6856381 - 2⁹ = 6855869 is a prime.

It is a super-2 number, since 2×6856381² = 94019920834322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6856381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5320 + ... + 6481.

It is an arithmetic number, because the mean of its divisors is an integer number (991368).

Almost surely, 2^6856381 is an apocalyptic number.

It is an amenable number.

6856381 is a deficient number, since it is larger than the sum of its proper divisors (1074563).

6856381 is a wasteful number, since it uses less digits than its factorization.

6856381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11891.

The product of its digits is 34560, while the sum is 37.

The square root of 6856381 is about 2618.4692092900. The cubic root of 6856381 is about 189.9758140959.

It can be divided in two parts, 68563 and 81, that added together give a square (68644 = 262²).

The spelling of 6856381 in words is "six million, eight hundred fifty-six thousand, three hundred eighty-one".