12122917 has 4 divisors (see below), whose sum is σ = 12149676. Its totient is φ = 12096160.

The previous prime is 12122879. The next prime is 12122933. The reversal of 12122917 is 71922121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4800481 + 7322436 = 2191^2 + 2706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122891 and 12122900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122977) 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, 12688 + ... + 13609.

It is an arithmetic number, because the mean of its divisors is an integer number (3037419).

Almost surely, 2^12122917 is an apocalyptic number.

It is an amenable number.

12122917 is a deficient number, since it is larger than the sum of its proper divisors (26759).

12122917 is an equidigital number, since it uses as much as digits as its factorization.

12122917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26758.

The product of its digits is 504, while the sum is 25.

The square root of 12122917 is about 3481.7979550801. The cubic root of 12122917 is about 229.7218881704.

The spelling of 12122917 in words is "twelve million, one hundred twenty-two thousand, nine hundred seventeen".