1218859 has 2 divisors, whose sum is σ = 1218860. Its totient is φ = 1218858.

The previous prime is 1218853. The next prime is 1218901. The reversal of 1218859 is 9588121.

It is a weak prime.

It is an emirp because it is prime and its reverse (9588121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1218859 - 2⁷ = 1218731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1218853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609429 + 609430.

It is an arithmetic number, because the mean of its divisors is an integer number (609430).

2^1218859 is an apocalyptic number.

1218859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218859 is an equidigital number, since it uses as much as digits as its factorization.

1218859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 34.

The square root of 1218859 is about 1104.0194744659. The cubic root of 1218859 is about 106.8196513564.

The spelling of 1218859 in words is "one million, two hundred eighteen thousand, eight hundred fifty-nine".