1218043 has 2 divisors, whose sum is σ = 1218044. Its totient is φ = 1218042.

The previous prime is 1218017. The next prime is 1218089. The reversal of 1218043 is 3408121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3408121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218043 is a prime.

1218043 is a lucky number.

It is equal to p₉₄₂₁₃ and since 1218043 and 94213 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1218043.

It is not a weakly prime, because it can be changed into another prime (1216043) 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, 609021 + 609022.

It is an arithmetic number, because the mean of its divisors is an integer number (609022).

2^1218043 is an apocalyptic number.

1218043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218043 is an equidigital number, since it uses as much as digits as its factorization.

1218043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1218043 is about 1103.6498538939. The cubic root of 1218043 is about 106.7958082117.

The spelling of 1218043 in words is "one million, two hundred eighteen thousand, forty-three".