128884501 has 2 divisors, whose sum is σ = 128884502. Its totient is φ = 128884500.

The previous prime is 128884487. The next prime is 128884507. The reversal of 128884501 is 105488821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128822500 + 62001 = 11350^2 + 249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128884501 is a prime.

It is a super-2 number, since 2×128884501² = 33222429196038002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128884507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64442250 + 64442251.

It is an arithmetic number, because the mean of its divisors is an integer number (64442251).

Almost surely, 2^128884501 is an apocalyptic number.

It is an amenable number.

128884501 is a deficient number, since it is larger than the sum of its proper divisors (1).

128884501 is an equidigital number, since it uses as much as digits as its factorization.

128884501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 128884501 is about 11352.7309930254. The cubic root of 128884501 is about 505.1265911442.

The spelling of 128884501 in words is "one hundred twenty-eight million, eight hundred eighty-four thousand, five hundred one".