1218473 has 2 divisors, whose sum is σ = 1218474. Its totient is φ = 1218472.

The previous prime is 1218467. The next prime is 1218487. The reversal of 1218473 is 3748121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620944 + 597529 = 788^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218473 - 2⁴ = 1218457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1218433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609236 + 609237.

It is an arithmetic number, because the mean of its divisors is an integer number (609237).

2^1218473 is an apocalyptic number.

It is an amenable number.

1218473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218473 is an equidigital number, since it uses as much as digits as its factorization.

1218473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 1218473 is about 1103.8446448663. The cubic root of 1218473 is about 106.8083739407.

The spelling of 1218473 in words is "one million, two hundred eighteen thousand, four hundred seventy-three".