12421316 has 6 divisors (see below), whose sum is σ = 21737310. Its totient is φ = 6210656.

The previous prime is 12421291. The next prime is 12421327. The reversal of 12421316 is 61312421.

It can be written as a sum of positive squares in only one way, i.e., 7268416 + 5152900 = 2696^2 + 2270^2 .

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 as a sum of consecutive naturals, namely, 1552661 + ... + 1552668.

It is an arithmetic number, because the mean of its divisors is an integer number (3622885).

Almost surely, 2^12421316 is an apocalyptic number.

It is an amenable number.

12421316 is a deficient number, since it is larger than the sum of its proper divisors (9315994).

12421316 is a wasteful number, since it uses less digits than its factorization.

12421316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105333 (or 3105331 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 12421316 is about 3524.3887413281. The cubic root of 12421316 is about 231.5914579692.

Adding to 12421316 its reverse (61312421), we get a palindrome (73733737).

The spelling of 12421316 in words is "twelve million, four hundred twenty-one thousand, three hundred sixteen".