12707218 has 8 divisors (see below), whose sum is σ = 19081548. Its totient is φ = 6346704.

The previous prime is 12707147. The next prime is 12707237. The reversal of 12707218 is 81270721.

It can be written as a sum of positive squares in 2 ways, for example, as 10478169 + 2229049 = 3237^2 + 1493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12707218² = 322946778599048, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721 + ... + 5092.

Almost surely, 2^12707218 is an apocalyptic number.

12707218 is a deficient number, since it is larger than the sum of its proper divisors (6374330).

12707218 is a wasteful number, since it uses less digits than its factorization.

12707218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6908.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 12707218 is about 3564.7185022102. The cubic root of 12707218 is about 233.3548474494.

Adding to 12707218 its reverse (81270721), we get a palindrome (93977939).

The spelling of 12707218 in words is "twelve million, seven hundred seven thousand, two hundred eighteen".