1366218 has 36 divisors (see below), whose sum is σ = 3445650. Its totient is φ = 390096.

The previous prime is 1366213. The next prime is 1366241. The reversal of 1366218 is 8126631.

1366218 is a `hidden beast` number, since 1 + 36 + 621 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1238769 + 127449 = 1113^2 + 357^2 .

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1366191 and 1366200.

It is not an unprimeable number, because it can be changed into a prime (1366213) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 108 + ... + 1656.

2^1366218 is an apocalyptic number.

1366218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722825).

1366218 is an abundant number, since it is smaller than the sum of its proper divisors (2079432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1366218 is a wasteful number, since it uses less digits than its factorization.

1366218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571 (or 1561 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1366218 is about 1168.8532842064. The cubic root of 1366218 is about 110.9617594106.

The spelling of 1366218 in words is "one million, three hundred sixty-six thousand, two hundred eighteen".