6861811 has 16 divisors (see below), whose sum is σ = 7793280. Its totient is φ = 5987520.

The previous prime is 6861809. The next prime is 6861817. The reversal of 6861811 is 1181686.

It is a happy number.

It is not a de Polignac number, because 6861811 - 2¹ = 6861809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6861817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42016 + ... + 42178.

It is an arithmetic number, because the mean of its divisors is an integer number (487080).

Almost surely, 2^6861811 is an apocalyptic number.

6861811 is a deficient number, since it is larger than the sum of its proper divisors (931469).

6861811 is a wasteful number, since it uses less digits than its factorization.

6861811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306.

The product of its digits is 2304, while the sum is 31.

The square root of 6861811 is about 2619.5058694342. The cubic root of 6861811 is about 190.0259521337.

The spelling of 6861811 in words is "six million, eight hundred sixty-one thousand, eight hundred eleven".