128802001 has 4 divisors (see below), whose sum is σ = 134402112. Its totient is φ = 123201892.

The previous prime is 128801989. The next prime is 128802019. The reversal of 128802001 is 100208821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100208821 = 617 ⋅162413.

It is not a de Polignac number, because 128802001 - 2⁷ = 128801873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128802041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2800021 + ... + 2800066.

It is an arithmetic number, because the mean of its divisors is an integer number (33600528).

Almost surely, 2^128802001 is an apocalyptic number.

It is an amenable number.

128802001 is a deficient number, since it is larger than the sum of its proper divisors (5600111).

128802001 is an equidigital number, since it uses as much as digits as its factorization.

128802001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5600110.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 128802001 is about 11349.0969244253. The cubic root of 128802001 is about 505.0187896156.

The spelling of 128802001 in words is "one hundred twenty-eight million, eight hundred two thousand, one".