128280101 has 8 divisors (see below), whose sum is σ = 130636800. Its totient is φ = 125929600.

The previous prime is 128280083. The next prime is 128280109. The reversal of 128280101 is 101082821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128280101 - 2⁶ = 128280037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128280109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66965 + ... + 68853.

It is an arithmetic number, because the mean of its divisors is an integer number (16329600).

Almost surely, 2^128280101 is an apocalyptic number.

It is an amenable number.

128280101 is a deficient number, since it is larger than the sum of its proper divisors (2356699).

128280101 is a wasteful number, since it uses less digits than its factorization.

128280101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 128280101 is about 11326.0805665508. The cubic root of 128280101 is about 504.3357616652.

The spelling of 128280101 in words is "one hundred twenty-eight million, two hundred eighty thousand, one hundred one".