128103001 has 4 divisors (see below), whose sum is σ = 137957092. Its totient is φ = 118248912.

The previous prime is 128102987. The next prime is 128103011. The reversal of 128103001 is 100301821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24552025 + 103550976 = 4955^2 + 10176^2 .

It is a cyclic number.

It is not a de Polignac number, because 128103001 - 2⁵ = 128102969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128103011) 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, 4927026 + ... + 4927051.

It is an arithmetic number, because the mean of its divisors is an integer number (34489273).

Almost surely, 2^128103001 is an apocalyptic number.

It is an amenable number.

128103001 is a deficient number, since it is larger than the sum of its proper divisors (9854091).

128103001 is an equidigital number, since it uses as much as digits as its factorization.

128103001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9854090.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 128103001 is about 11318.2596276990. The cubic root of 128103001 is about 504.1035640562.

Adding to 128103001 its reverse (100301821), we get a palindrome (228404822).

The spelling of 128103001 in words is "one hundred twenty-eight million, one hundred three thousand, one".