2005124287 has 2 divisors, whose sum is σ = 2005124288. Its totient is φ = 2005124286.

The previous prime is 2005124281. The next prime is 2005124339. The reversal of 2005124287 is 7824215002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005124287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2005124281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002562143 + 1002562144.

It is an arithmetic number, because the mean of its divisors is an integer number (1002562144).

Almost surely, 2^2005124287 is an apocalyptic number.

2005124287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005124287 is an equidigital number, since it uses as much as digits as its factorization.

2005124287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 2005124287 is about 44778.6141701594. The cubic root of 2005124287 is about 1260.9961650601.

Adding to 2005124287 its reverse (7824215002), we get a palindrome (9829339289).

The spelling of 2005124287 in words is "two billion, five million, one hundred twenty-four thousand, two hundred eighty-seven".