12631212 has 72 divisors (see below), whose sum is σ = 35223552. Its totient is φ = 3784800.

The previous prime is 12631193. The next prime is 12631237. The reversal of 12631212 is 21213621.

12631212 is a `hidden beast` number, since 12 + 631 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

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 23 ways as a sum of consecutive naturals, for example, 66037 + ... + 66227.

It is an arithmetic number, because the mean of its divisors is an integer number (489216).

Almost surely, 2^12631212 is an apocalyptic number.

12631212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12631212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17611776).

12631212 is an abundant number, since it is smaller than the sum of its proper divisors (22592340).

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

12631212 is a wasteful number, since it uses less digits than its factorization.

12631212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 374 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 12631212 is about 3554.0416429749. The cubic root of 12631212 is about 232.8886596800. Note that the first 3 decimals are identical.

Adding to 12631212 its reverse (21213621), we get a palindrome (33844833).

The spelling of 12631212 in words is "twelve million, six hundred thirty-one thousand, two hundred twelve".