1218307 has 2 divisors, whose sum is σ = 1218308. Its totient is φ = 1218306.

The previous prime is 1218281. The next prime is 1218313. The reversal of 1218307 is 7038121.

It is a strong prime.

It is an emirp because it is prime and its reverse (7038121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1218307 - 2⁷ = 1218179 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1218367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609153 + 609154.

It is an arithmetic number, because the mean of its divisors is an integer number (609154).

2^1218307 is an apocalyptic number.

1218307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218307 is an equidigital number, since it uses as much as digits as its factorization.

1218307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1218307 is about 1103.7694505647. The cubic root of 1218307 is about 106.8035233353.

The spelling of 1218307 in words is "one million, two hundred eighteen thousand, three hundred seven".