1287683 has 2 divisors, whose sum is σ = 1287684. Its totient is φ = 1287682.

The previous prime is 1287661. The next prime is 1287691. The reversal of 1287683 is 3867821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1287683 - 2¹⁴ = 1271299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643841 + 643842.

It is an arithmetic number, because the mean of its divisors is an integer number (643842).

2^1287683 is an apocalyptic number.

1287683 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287683 is an equidigital number, since it uses as much as digits as its factorization.

1287683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 1287683 is about 1134.7612083606. The cubic root of 1287683 is about 108.7935096961.

The spelling of 1287683 in words is "one million, two hundred eighty-seven thousand, six hundred eighty-three".