1218367 has 2 divisors, whose sum is σ = 1218368. Its totient is φ = 1218366.

The previous prime is 1218313. The next prime is 1218383. The reversal of 1218367 is 7638121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1218367 - 2¹⁹ = 694079 is a prime.

It is a Chen prime.

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

1218367 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609183 + 609184.

It is an arithmetic number, because the mean of its divisors is an integer number (609184).

2^1218367 is an apocalyptic number.

1218367 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218367 is an equidigital number, since it uses as much as digits as its factorization.

1218367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 1218367 is about 1103.7966298191. The cubic root of 1218367 is about 106.8052766170.

The spelling of 1218367 in words is "one million, two hundred eighteen thousand, three hundred sixty-seven".