1218042170 has 16 divisors (see below), whose sum is σ = 2195340840. Its totient is φ = 486580224.

The previous prime is 1218042169. The next prime is 1218042193. The reversal of 1218042170 is 712408121.

It can be written as a sum of positive squares in 4 ways, for example, as 1171761361 + 46280809 = 34231^2 + 6803^2 .

It is a Curzon 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, 71507 + ... + 86886.

Almost surely, 2^1218042170 is an apocalyptic number.

1218042170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218042170 is a deficient number, since it is larger than the sum of its proper divisors (977298670).

1218042170 is a wasteful number, since it uses less digits than its factorization.

1218042170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159169.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 1218042170 is about 34900.4608852090. The cubic root of 1218042170 is about 1067.9578395407.

The spelling of 1218042170 in words is "one billion, two hundred eighteen million, forty-two thousand, one hundred seventy".