1287047 has 2 divisors, whose sum is σ = 1287048. Its totient is φ = 1287046.

The previous prime is 1287007. The next prime is 1287059. The reversal of 1287047 is 7407821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1287047 - 2⁶ = 1286983 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 (1287007) 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, 643523 + 643524.

It is an arithmetic number, because the mean of its divisors is an integer number (643524).

2^1287047 is an apocalyptic number.

1287047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287047 is an equidigital number, since it uses as much as digits as its factorization.

1287047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 1287047 is about 1134.4809385794. The cubic root of 1287047 is about 108.7755953318.

The spelling of 1287047 in words is "one million, two hundred eighty-seven thousand, forty-seven".