12506216 has 8 divisors (see below), whose sum is σ = 23449170. Its totient is φ = 6253104.

The previous prime is 12506167. The next prime is 12506233. The reversal of 12506216 is 61260521.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 2709316 = 3130^2 + 1646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×12506216³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12506191 and 12506200.

It is an unprimeable number.

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, 781631 + ... + 781646.

Almost surely, 2^12506216 is an apocalyptic number.

It is an amenable number.

12506216 is a deficient number, since it is larger than the sum of its proper divisors (10942954).

12506216 is a wasteful number, since it uses less digits than its factorization.

12506216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563283 (or 1563279 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12506216 is about 3536.4128718237. The cubic root of 12506216 is about 232.1179047940.

Adding to 12506216 its reverse (61260521), we get a palindrome (73766737).

The spelling of 12506216 in words is "twelve million, five hundred six thousand, two hundred sixteen".