1287179 has 2 divisors, whose sum is σ = 1287180. Its totient is φ = 1287178.

The previous prime is 1287173. The next prime is 1287197. The reversal of 1287179 is 9717821.

Together with next prime (1287197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1287179 - 2⁴ = 1287163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643589 + 643590.

It is an arithmetic number, because the mean of its divisors is an integer number (643590).

2^1287179 is an apocalyptic number.

1287179 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287179 is an equidigital number, since it uses as much as digits as its factorization.

1287179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 35.

The square root of 1287179 is about 1134.5391134730. The cubic root of 1287179 is about 108.7793138927.

The spelling of 1287179 in words is "one million, two hundred eighty-seven thousand, one hundred seventy-nine".