912218 has 4 divisors (see below), whose sum is σ = 1368330. Its totient is φ = 456108.

The previous prime is 912217. The next prime is 912227. The reversal of 912218 is 812219.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812219 = 523 ⋅1553.

It can be written as a sum of positive squares in only one way, i.e., 485809 + 426409 = 697^2 + 653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 912193 and 912202.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 912218.

It is not an unprimeable number, because it can be changed into a prime (912211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228053 + ... + 228056.

2⁹¹²²¹⁸ is an apocalyptic number.

912218 is a deficient number, since it is larger than the sum of its proper divisors (456112).

912218 is a wasteful number, since it uses less digits than its factorization.

912218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456111.

The product of its digits is 288, while the sum is 23.

The square root of 912218 is about 955.1010417752. The cubic root of 912218 is about 96.9838780022.

Subtracting from 912218 its reverse (812219), we obtain a palindrome (99999).

The spelling of 912218 in words is "nine hundred twelve thousand, two hundred eighteen".