1218055 has 8 divisors (see below), whose sum is σ = 1486800. Its totient is φ = 957696.

The previous prime is 1218043. The next prime is 1218089. The reversal of 1218055 is 5508121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1218055 - 2⁷ = 1217927 is a prime.

1218055 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1770 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (185850).

2^1218055 is an apocalyptic number.

1218055 is a deficient number, since it is larger than the sum of its proper divisors (268745).

1218055 is an equidigital number, since it uses as much as digits as its factorization.

1218055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1218055 is about 1103.6552903874. The cubic root of 1218055 is about 106.7961589233.

The spelling of 1218055 in words is "one million, two hundred eighteen thousand, fifty-five".