12404417 has 2 divisors, whose sum is σ = 12404418. Its totient is φ = 12404416.

The previous prime is 12404401. The next prime is 12404419. The reversal of 12404417 is 71440421.

It is a happy number.

12404417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7187761 + 5216656 = 2681^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 12404417 - 2⁴ = 12404401 is a prime.

It is a super-2 number, since 2×12404417² = 307739122219778, which contains 22 as substring.

Together with 12404419, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12404392 and 12404401.

It is not a weakly prime, because it can be changed into another prime (12404419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6202208 + 6202209.

It is an arithmetic number, because the mean of its divisors is an integer number (6202209).

Almost surely, 2^12404417 is an apocalyptic number.

It is an amenable number.

12404417 is a deficient number, since it is larger than the sum of its proper divisors (1).

12404417 is an equidigital number, since it uses as much as digits as its factorization.

12404417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 12404417 is about 3521.9904883460. The cubic root of 12404417 is about 231.4863848241.

Adding to 12404417 its reverse (71440421), we get a palindrome (83844838).

It can be divided in two parts, 12404 and 417, that added together give a palindrome (12821).

The spelling of 12404417 in words is "twelve million, four hundred four thousand, four hundred seventeen".