12401216 has 28 divisors (see below), whose sum is σ = 25278588. Its totient is φ = 6031872.

The previous prime is 12401189. The next prime is 12401251. The reversal of 12401216 is 61210421.

It can be written as a sum of positive squares in 2 ways, for example, as 10863616 + 1537600 = 3296^2 + 1240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12401194 and 12401203.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 251 + ... + 4986.

Almost surely, 2^12401216 is an apocalyptic number.

12401216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12401216 is an abundant number, since it is smaller than the sum of its proper divisors (12877372).

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

12401216 is an equidigital number, since it uses as much as digits as its factorization.

12401216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286 (or 5276 counting only the distinct ones).

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

The square root of 12401216 is about 3521.5360284967. The cubic root of 12401216 is about 231.4664711738.

Adding to 12401216 its reverse (61210421), we get a palindrome (73611637).

The spelling of 12401216 in words is "twelve million, four hundred one thousand, two hundred sixteen".