6861851 has 2 divisors, whose sum is σ = 6861852. Its totient is φ = 6861850.

The previous prime is 6861847. The next prime is 6861913. The reversal of 6861851 is 1581686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6861851 - 2² = 6861847 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6861821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430925 + 3430926.

It is an arithmetic number, because the mean of its divisors is an integer number (3430926).

Almost surely, 2^6861851 is an apocalyptic number.

6861851 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861851 is an equidigital number, since it uses as much as digits as its factorization.

6861851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 35.

The square root of 6861851 is about 2619.5135044508. The cubic root of 6861851 is about 190.0263213765.

The spelling of 6861851 in words is "six million, eight hundred sixty-one thousand, eight hundred fifty-one".