12421016 has 16 divisors (see below), whose sum is σ = 24659640. Its totient is φ = 5845120.

The previous prime is 12421009. The next prime is 12421021. The reversal of 12421016 is 61012421.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 12420985 and 12421003.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 45530 + ... + 45801.

Almost surely, 2^12421016 is an apocalyptic number.

It is an amenable number.

12421016 is a deficient number, since it is larger than the sum of its proper divisors (12238624).

12421016 is a wasteful number, since it uses less digits than its factorization.

12421016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91354 (or 91350 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 12421016 is about 3524.3461804993. The cubic root of 12421016 is about 231.5895934862.

Adding to 12421016 its reverse (61012421), we get a palindrome (73433437).

The spelling of 12421016 in words is "twelve million, four hundred twenty-one thousand, sixteen".