7850861 has 2 divisors, whose sum is σ = 7850862. Its totient is φ = 7850860.

The previous prime is 7850849. The next prime is 7850881. The reversal of 7850861 is 1680587.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6708100 + 1142761 = 2590^2 + 1069^2 .

It is a cyclic number.

It is not a de Polignac number, because 7850861 - 2¹⁰ = 7849837 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 (7850881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3925430 + 3925431.

It is an arithmetic number, because the mean of its divisors is an integer number (3925431).

Almost surely, 2^7850861 is an apocalyptic number.

It is an amenable number.

7850861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7850861 is an equidigital number, since it uses as much as digits as its factorization.

7850861 is an evil number, because the sum of its binary digits is even.

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

The square root of 7850861 is about 2801.9387930503. The cubic root of 7850861 is about 198.7493709353.

The spelling of 7850861 in words is "seven million, eight hundred fifty thousand, eight hundred sixty-one".