2285861 has 2 divisors, whose sum is σ = 2285862. Its totient is φ = 2285860.

The previous prime is 2285821. The next prime is 2285863. The reversal of 2285861 is 1685822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 516961 = 1330^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 2285861 - 2⁶ = 2285797 is a prime.

It is a super-2 number, since 2×2285861² = 10450321022642, which contains 22 as substring.

Together with 2285863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2285863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1142930 + 1142931.

It is an arithmetic number, because the mean of its divisors is an integer number (1142931).

2^2285861 is an apocalyptic number.

It is an amenable number.

2285861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2285861 is an equidigital number, since it uses as much as digits as its factorization.

2285861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 2285861 is about 1511.9064124475. The cubic root of 2285861 is about 131.7295695450.

The spelling of 2285861 in words is "two million, two hundred eighty-five thousand, eight hundred sixty-one".