8041861 has 2 divisors, whose sum is σ = 8041862. Its totient is φ = 8041860.

The previous prime is 8041853. The next prime is 8041879. The reversal of 8041861 is 1681408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6400900 + 1640961 = 2530^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 8041861 - 2³ = 8041853 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8041801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4020930 + 4020931.

It is an arithmetic number, because the mean of its divisors is an integer number (4020931).

Almost surely, 2^8041861 is an apocalyptic number.

It is an amenable number.

8041861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8041861 is an equidigital number, since it uses as much as digits as its factorization.

8041861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 8041861 is about 2835.8175188118. The cubic root of 8041861 is about 200.3482349768.

The spelling of 8041861 in words is "eight million, forty-one thousand, eight hundred sixty-one".