405287 has 2 divisors, whose sum is σ = 405288. Its totient is φ = 405286.

The previous prime is 405277. The next prime is 405299. The reversal of 405287 is 782504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405287 - 2¹⁴ = 388903 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405287.

It is not a weakly prime, because it can be changed into another prime (405227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202643 + 202644.

It is an arithmetic number, because the mean of its divisors is an integer number (202644).

2⁴⁰⁵²⁸⁷ is an apocalyptic number.

405287 is a deficient number, since it is larger than the sum of its proper divisors (1).

405287 is an equidigital number, since it uses as much as digits as its factorization.

405287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 405287 is about 636.6215516302. The cubic root of 405287 is about 74.0038347173.

The spelling of 405287 in words is "four hundred five thousand, two hundred eighty-seven".