12218607 has 10 divisors (see below), whose sum is σ = 18252608. Its totient is φ = 8145684.

The previous prime is 12218587. The next prime is 12218611. The reversal of 12218607 is 70681221.

It is not a de Polignac number, because 12218607 - 2¹¹ = 12216559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218617) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 75343 + ... + 75504.

Almost surely, 2^12218607 is an apocalyptic number.

12218607 is a deficient number, since it is larger than the sum of its proper divisors (6034001).

12218607 is an equidigital number, since it uses as much as digits as its factorization.

12218607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150859 (or 150850 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 12218607 is about 3495.5124087893. The cubic root of 12218607 is about 230.3247272011.

Adding to 12218607 its reverse (70681221), we get a palindrome (82899828).

The spelling of 12218607 in words is "twelve million, two hundred eighteen thousand, six hundred seven".