128466517 has 2 divisors, whose sum is σ = 128466518. Its totient is φ = 128466516.

The previous prime is 128466497. The next prime is 128466529. The reversal of 128466517 is 715664821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117483921 + 10982596 = 10839^2 + 3314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128466517 is a prime.

It is a super-2 number, since 2×128466517² = 33007291980222578, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128466517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128466577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64233258 + 64233259.

It is an arithmetic number, because the mean of its divisors is an integer number (64233259).

Almost surely, 2^128466517 is an apocalyptic number.

It is an amenable number.

128466517 is a deficient number, since it is larger than the sum of its proper divisors (1).

128466517 is an equidigital number, since it uses as much as digits as its factorization.

128466517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 128466517 is about 11334.3070807174. The cubic root of 128466517 is about 504.5799428231.

The spelling of 128466517 in words is "one hundred twenty-eight million, four hundred sixty-six thousand, five hundred seventeen".