12105417 has 4 divisors (see below), whose sum is σ = 16140560. Its totient is φ = 8070276.

The previous prime is 12105397. The next prime is 12105419. The reversal of 12105417 is 71450121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12105417 - 2¹⁵ = 12072649 is a prime.

It is a super-2 number, since 2×12105417² = 293082241487778, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12105393 and 12105402.

It is not an unprimeable number, because it can be changed into a prime (12105419) by changing a digit.

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, 2017567 + ... + 2017572.

It is an arithmetic number, because the mean of its divisors is an integer number (4035140).

Almost surely, 2^12105417 is an apocalyptic number.

It is an amenable number.

12105417 is a deficient number, since it is larger than the sum of its proper divisors (4035143).

12105417 is an equidigital number, since it uses as much as digits as its factorization.

12105417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035142.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 12105417 is about 3479.2839780622. The cubic root of 12105417 is about 229.6112968275.

Adding to 12105417 its reverse (71450121), we get a palindrome (83555538).

The spelling of 12105417 in words is "twelve million, one hundred five thousand, four hundred seventeen".