130128123 has 8 divisors (see below), whose sum is σ = 174005568. Its totient is φ = 86501384.

The previous prime is 130128113. The next prime is 130128139. The reversal of 130128123 is 321821031.

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

It is a cyclic number.

It is not a de Polignac number, because 130128123 - 2⁸ = 130127867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130128123.

It is not an unprimeable number, because it can be changed into a prime (130128113) 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, 61461 + ... + 63542.

It is an arithmetic number, because the mean of its divisors is an integer number (21750696).

Almost surely, 2^130128123 is an apocalyptic number.

130128123 is a deficient number, since it is larger than the sum of its proper divisors (43877445).

130128123 is a wasteful number, since it uses less digits than its factorization.

130128123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125353.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 130128123 is about 11407.3714325431. The cubic root of 130128123 is about 506.7460690905.

Adding to 130128123 its reverse (321821031), we get a palindrome (451949154).

The spelling of 130128123 in words is "one hundred thirty million, one hundred twenty-eight thousand, one hundred twenty-three".