6781085 has 8 divisors (see below), whose sum is σ = 8291160. Its totient is φ = 5322304.

The previous prime is 6781063. The next prime is 6781087. The reversal of 6781085 is 5801876.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2627641 + 4153444 = 1621^2 + 2038^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6781085 is a prime.

It is a super-2 number, since 2×6781085² = 91966227554450, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781087) 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, 12530 + ... + 13059.

It is an arithmetic number, because the mean of its divisors is an integer number (1036395).

Almost surely, 2^6781085 is an apocalyptic number.

It is an amenable number.

6781085 is a deficient number, since it is larger than the sum of its proper divisors (1510075).

6781085 is a wasteful number, since it uses less digits than its factorization.

6781085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25647.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 6781085 is about 2604.0516507934. The cubic root of 6781085 is about 189.2778217733.

The spelling of 6781085 in words is "six million, seven hundred eighty-one thousand, eighty-five".