128210267 has 2 divisors, whose sum is σ = 128210268. Its totient is φ = 128210266.

The previous prime is 128210263. The next prime is 128210273. The reversal of 128210267 is 762012821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128210267 - 2² = 128210263 is a prime.

It is a super-2 number, since 2×128210267² = 32875745128422578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128210263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64105133 + 64105134.

It is an arithmetic number, because the mean of its divisors is an integer number (64105134).

Almost surely, 2^128210267 is an apocalyptic number.

128210267 is a deficient number, since it is larger than the sum of its proper divisors (1).

128210267 is an equidigital number, since it uses as much as digits as its factorization.

128210267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 128210267 is about 11322.9972622093. The cubic root of 128210267 is about 504.2442271344.

The spelling of 128210267 in words is "one hundred twenty-eight million, two hundred ten thousand, two hundred sixty-seven".