12621712 has 20 divisors (see below), whose sum is σ = 25244416. Its totient is φ = 6107040.

The previous prime is 12621703. The next prime is 12621731. The reversal of 12621712 is 21712621.

It is a happy number.

12621712 is an admirable number.

It is a super-2 number, since 2×12621712² = 318615227621888, which contains 22 as substring.

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, 12228 + ... + 13219.

Almost surely, 2^12621712 is an apocalyptic number.

It is an amenable number.

12621712 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12621712 is a wasteful number, since it uses less digits than its factorization.

12621712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25486 (or 25480 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The square root of 12621712 is about 3552.7048850137. The cubic root of 12621712 is about 232.8302594473.

Subtracting 12621712 from its reverse (21712621), we obtain a palindrome (9090909).

The spelling of 12621712 in words is "twelve million, six hundred twenty-one thousand, seven hundred twelve".