102405287 has 2 divisors, whose sum is σ = 102405288. Its totient is φ = 102405286.

The previous prime is 102405283. The next prime is 102405311. The reversal of 102405287 is 782504201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102405287 - 2² = 102405283 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 (102405283) 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, 51202643 + 51202644.

It is an arithmetic number, because the mean of its divisors is an integer number (51202644).

Almost surely, 2^102405287 is an apocalyptic number.

102405287 is a deficient number, since it is larger than the sum of its proper divisors (1).

102405287 is an equidigital number, since it uses as much as digits as its factorization.

102405287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 102405287 is about 10119.5497429481. The cubic root of 102405287 is about 467.8508896848.

Adding to 102405287 its reverse (782504201), we get a palindrome (884909488).

The spelling of 102405287 in words is "one hundred two million, four hundred five thousand, two hundred eighty-seven".