1178218 has 4 divisors (see below), whose sum is σ = 1767330. Its totient is φ = 589108.

The previous prime is 1178213. The next prime is 1178227. The reversal of 1178218 is 8128711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8128711 = 2113 ⋅3847.

It can be written as a sum of positive squares in only one way, i.e., 1172889 + 5329 = 1083^2 + 73^2 .

It is not an unprimeable number, because it can be changed into a prime (1178213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 294553 + ... + 294556.

2^1178218 is an apocalyptic number.

1178218 is a deficient number, since it is larger than the sum of its proper divisors (589112).

1178218 is an equidigital number, since it uses as much as digits as its factorization.

1178218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589111.

The product of its digits is 896, while the sum is 28.

The square root of 1178218 is about 1085.4575072291. The cubic root of 1178218 is about 105.6189594249.

The spelling of 1178218 in words is "one million, one hundred seventy-eight thousand, two hundred eighteen".