12408217 has 4 divisors (see below), whose sum is σ = 12456756. Its totient is φ = 12359680.

The previous prime is 12408211. The next prime is 12408223. The reversal of 12408217 is 71280421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12408211) and next prime (12408223).

It can be written as a sum of positive squares in 2 ways, for example, as 9665881 + 2742336 = 3109^2 + 1656^2 .

It is a cyclic number.

It is not a de Polignac number, because 12408217 - 2⁷ = 12408089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12408191 and 12408200.

It is not an unprimeable number, because it can be changed into a prime (12408211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23884 + ... + 24397.

It is an arithmetic number, because the mean of its divisors is an integer number (3114189).

Almost surely, 2^12408217 is an apocalyptic number.

It is an amenable number.

12408217 is a deficient number, since it is larger than the sum of its proper divisors (48539).

12408217 is an equidigital number, since it uses as much as digits as its factorization.

12408217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48538.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 12408217 is about 3522.5299147062. The cubic root of 12408217 is about 231.5100204493.

Adding to 12408217 its reverse (71280421), we get a palindrome (83688638).

The spelling of 12408217 in words is "twelve million, four hundred eight thousand, two hundred seventeen".