12416521 has 8 divisors (see below), whose sum is σ = 13401920. Its totient is φ = 11435472.

The previous prime is 12416513. The next prime is 12416531. The reversal of 12416521 is 12561421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12416521 - 2³ = 12416513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12416492 and 12416501.

It is not an unprimeable number, because it can be changed into a prime (12416501) 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, 7276 + ... + 8818.

It is an arithmetic number, because the mean of its divisors is an integer number (1675240).

Almost surely, 2^12416521 is an apocalyptic number.

It is an amenable number.

12416521 is a deficient number, since it is larger than the sum of its proper divisors (985399).

12416521 is a wasteful number, since it uses less digits than its factorization.

12416521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175.

The product of its digits is 480, while the sum is 22.

The square root of 12416521 is about 3523.7084158596. The cubic root of 12416521 is about 231.5616537207.

Adding to 12416521 its reverse (12561421), we get a palindrome (24977942).

The spelling of 12416521 in words is "twelve million, four hundred sixteen thousand, five hundred twenty-one".