12312621 has 8 divisors (see below), whose sum is σ = 18240960. Its totient is φ = 8208396.

The previous prime is 12312581. The next prime is 12312631. The reversal of 12312621 is 12621321.

12312621 is a `hidden beast` number, since 12 + 31 + 2 + 621 = 666.

12312621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12312621 - 2⁶ = 12312557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12312594 and 12312603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312631) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 227985 + ... + 228038.

It is an arithmetic number, because the mean of its divisors is an integer number (2280120).

Almost surely, 2^12312621 is an apocalyptic number.

It is an amenable number.

12312621 is a deficient number, since it is larger than the sum of its proper divisors (5928339).

12312621 is an equidigital number, since it uses as much as digits as its factorization.

12312621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456032 (or 456026 counting only the distinct ones).

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

The square root of 12312621 is about 3508.9344536483. The cubic root of 12312621 is about 230.9139500713.

Adding to 12312621 its reverse (12621321), we get a palindrome (24933942).

The spelling of 12312621 in words is "twelve million, three hundred twelve thousand, six hundred twenty-one".