1218973 has 6 divisors (see below), whose sum is σ = 1418046. Its totient is φ = 1044792.

The previous prime is 1218953. The next prime is 1218989. The reversal of 1218973 is 3798121.

It can be written as a sum of positive squares in only one way, i.e., 636804 + 582169 = 798^2 + 763^2 .

It is not a de Polignac number, because 1218973 - 2⁵ = 1218941 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218913) 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 in 5 ways as a sum of consecutive naturals, for example, 12390 + ... + 12487.

It is an arithmetic number, because the mean of its divisors is an integer number (236341).

2^1218973 is an apocalyptic number.

It is an amenable number.

1218973 is a deficient number, since it is larger than the sum of its proper divisors (199073).

1218973 is an equidigital number, since it uses as much as digits as its factorization.

1218973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24891 (or 24884 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 1218973 is about 1104.0711027828. The cubic root of 1218973 is about 106.8229815367.

The spelling of 1218973 in words is "one million, two hundred eighteen thousand, nine hundred seventy-three".