12581212 has 24 divisors (see below), whose sum is σ = 25237856. Its totient is φ = 5375808.

The previous prime is 12581183. The next prime is 12581227. The reversal of 12581212 is 21218521.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16798 + ... + 17530.

Almost surely, 2^12581212 is an apocalyptic number.

It is an amenable number.

12581212 is an abundant number, since it is smaller than the sum of its proper divisors (12656644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12581212 is a wasteful number, since it uses less digits than its factorization.

12581212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1355 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 12581212 is about 3547.0004228926. Note that the first 3 decimals coincide. The cubic root of 12581212 is about 232.5809607437.

Adding to 12581212 its reverse (21218521), we get a palindrome (33799733).

The spelling of 12581212 in words is "twelve million, five hundred eighty-one thousand, two hundred twelve".