1287707 has 2 divisors, whose sum is σ = 1287708. Its totient is φ = 1287706.

The previous prime is 1287697. The next prime is 1287731. The reversal of 1287707 is 7077821.

It is a weak prime.

It is an emirp because it is prime and its reverse (7077821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1287707 - 2⁴ = 1287691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1287757) 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, 643853 + 643854.

It is an arithmetic number, because the mean of its divisors is an integer number (643854).

2^1287707 is an apocalyptic number.

1287707 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287707 is an equidigital number, since it uses as much as digits as its factorization.

1287707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 1287707 is about 1134.7717832234. The cubic root of 1287707 is about 108.7941855943.

It can be divided in two parts, 1287 and 707, that multiplied together give a palindrome (909909).

The spelling of 1287707 in words is "one million, two hundred eighty-seven thousand, seven hundred seven".