128164541 has 2 divisors, whose sum is σ = 128164542. Its totient is φ = 128164540.

The previous prime is 128164529. The next prime is 128164573. The reversal of 128164541 is 145461821.

It is an a-pointer prime, because the next prime (128164573) can be obtained adding 128164541 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98505625 + 29658916 = 9925^2 + 5446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128164541 is a prime.

It is a super-2 number, since 2×128164541² = 32852299139481362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128164498 and 128164507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128184541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64082270 + 64082271.

It is an arithmetic number, because the mean of its divisors is an integer number (64082271).

Almost surely, 2^128164541 is an apocalyptic number.

It is an amenable number.

128164541 is a deficient number, since it is larger than the sum of its proper divisors (1).

128164541 is an equidigital number, since it uses as much as digits as its factorization.

128164541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The square root of 128164541 is about 11320.9779171236. The cubic root of 128164541 is about 504.1842740233.

The spelling of 128164541 in words is "one hundred twenty-eight million, one hundred sixty-four thousand, five hundred forty-one".