12128617 has 2 divisors, whose sum is σ = 12128618. Its totient is φ = 12128616.

The previous prime is 12128609. The next prime is 12128621. The reversal of 12128617 is 71682121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10916416 + 1212201 = 3304^2 + 1101^2 .

It is a cyclic number.

It is not a de Polignac number, because 12128617 - 2³ = 12128609 is a prime.

It is a super-3 number, since 3×12128617³ (a number of 22 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12128687) by changing a digit.

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 as a sum of consecutive naturals, namely, 6064308 + 6064309.

It is an arithmetic number, because the mean of its divisors is an integer number (6064309).

Almost surely, 2^12128617 is an apocalyptic number.

It is an amenable number.

12128617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12128617 is an equidigital number, since it uses as much as digits as its factorization.

12128617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 12128617 is about 3482.6164015005. The cubic root of 12128617 is about 229.7578863710.

The spelling of 12128617 in words is "twelve million, one hundred twenty-eight thousand, six hundred seventeen".