1286287 has 2 divisors, whose sum is σ = 1286288. Its totient is φ = 1286286.

The previous prime is 1286273. The next prime is 1286303. The reversal of 1286287 is 7826821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1286287 - 2¹⁵ = 1253519 is a prime.

1286287 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643143 + 643144.

It is an arithmetic number, because the mean of its divisors is an integer number (643144).

2^1286287 is an apocalyptic number.

1286287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286287 is an equidigital number, since it uses as much as digits as its factorization.

1286287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 1286287 is about 1134.1459341725. The cubic root of 1286287 is about 108.7541804884.

The spelling of 1286287 in words is "one million, two hundred eighty-six thousand, two hundred eighty-seven".