4036861 has 2 divisors, whose sum is σ = 4036862. Its totient is φ = 4036860.

The previous prime is 4036841. The next prime is 4036889. The reversal of 4036861 is 1686304.

4036861 = T₁₆₃₉ + T₁₆₄₀ + T₁₆₄₁.

It is an a-pointer prime, because the next prime (4036889) can be obtained adding 4036861 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3171961 + 864900 = 1781^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 4036861 - 2⁷ = 4036733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4036801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2018430 + 2018431.

It is an arithmetic number, because the mean of its divisors is an integer number (2018431).

Almost surely, 2^4036861 is an apocalyptic number.

4036861 is the 1641-st centered triangular number.

It is an amenable number.

4036861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4036861 is an equidigital number, since it uses as much as digits as its factorization.

4036861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 4036861 is about 2009.1941170529. The cubic root of 4036861 is about 159.2262249206.

The spelling of 4036861 in words is "four million, thirty-six thousand, eight hundred sixty-one".