1218130 has 16 divisors (see below), whose sum is σ = 2208024. Its totient is φ = 483840.

The previous prime is 1218121. The next prime is 1218131. The reversal of 1218130 is 318121.

It can be written as a sum of positive squares in 4 ways, for example, as 480249 + 737881 = 693^2 + 859^2 .

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1218131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1474 + ... + 2146.

2^1218130 is an apocalyptic number.

1218130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218130 is a deficient number, since it is larger than the sum of its proper divisors (989894).

1218130 is a wasteful number, since it uses less digits than its factorization.

1218130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1218130 is about 1103.6892678648. The cubic root of 1218130 is about 106.7983508188.

Subtracting from 1218130 its reverse (318121), we obtain a palindrome (900009).

The spelling of 1218130 in words is "one million, two hundred eighteen thousand, one hundred thirty".