6365861 has 2 divisors, whose sum is σ = 6365862. Its totient is φ = 6365860.

The previous prime is 6365857. The next prime is 6365869. The reversal of 6365861 is 1685636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4389025 + 1976836 = 2095^2 + 1406^2 .

It is a cyclic number.

It is not a de Polignac number, because 6365861 - 2² = 6365857 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6365869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182930 + 3182931.

It is an arithmetic number, because the mean of its divisors is an integer number (3182931).

Almost surely, 2^6365861 is an apocalyptic number.

It is an amenable number.

6365861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6365861 is an equidigital number, since it uses as much as digits as its factorization.

6365861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 6365861 is about 2523.0657938310. The cubic root of 6365861 is about 185.3328412796.

The spelling of 6365861 in words is "six million, three hundred sixty-five thousand, eight hundred sixty-one".