1216418 has 32 divisors (see below), whose sum is σ = 2332800. Its totient is φ = 463104.

The previous prime is 1216417. The next prime is 1216421. The reversal of 1216418 is 8146121.

It is a junction number, because it is equal to n+sod(n) for n = 1216393 and 1216402.

It is not an unprimeable number, because it can be changed into a prime (1216417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4388 + ... + 4656.

It is an arithmetic number, because the mean of its divisors is an integer number (72900).

2^1216418 is an apocalyptic number.

1216418 is a deficient number, since it is larger than the sum of its proper divisors (1116382).

1216418 is a wasteful number, since it uses less digits than its factorization.

1216418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314.

The product of its digits is 384, while the sum is 23.

The square root of 1216418 is about 1102.9134145526. The cubic root of 1216418 is about 106.7482947220.

The spelling of 1216418 in words is "one million, two hundred sixteen thousand, four hundred eighteen".