2185801 has 2 divisors, whose sum is σ = 2185802. Its totient is φ = 2185800.

The previous prime is 2185789. The next prime is 2185853. The reversal of 2185801 is 1085812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2178576 + 7225 = 1476^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185801 - 2¹⁷ = 2054729 is a prime.

It is not a weakly prime, because it can be changed into another prime (2185861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092900 + 1092901.

It is an arithmetic number, because the mean of its divisors is an integer number (1092901).

2^2185801 is an apocalyptic number.

It is an amenable number.

2185801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185801 is an equidigital number, since it uses as much as digits as its factorization.

2185801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 2185801 is about 1478.4454673744. The cubic root of 2185801 is about 129.7787360417.

The spelling of 2185801 in words is "two million, one hundred eighty-five thousand, eight hundred one".