12542218 has 8 divisors (see below), whose sum is σ = 20260548. Its totient is φ = 5788704.

The previous prime is 12542191. The next prime is 12542227. The reversal of 12542218 is 81224521.

12542218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10004569 + 2537649 = 3163^2 + 1593^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12542192 and 12542201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241171 + ... + 241222.

Almost surely, 2^12542218 is an apocalyptic number.

12542218 is a deficient number, since it is larger than the sum of its proper divisors (7718330).

12542218 is a wasteful number, since it uses less digits than its factorization.

12542218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482408.

The product of its digits is 1280, while the sum is 25.

The square root of 12542218 is about 3541.4993999717. The cubic root of 12542218 is about 232.3404262108.

Adding to 12542218 its reverse (81224521), we get a palindrome (93766739).

The spelling of 12542218 in words is "twelve million, five hundred forty-two thousand, two hundred eighteen".