5128129 has 4 divisors (see below), whose sum is σ = 5143684. Its totient is φ = 5112576.

The previous prime is 5128063. The next prime is 5128153. The reversal of 5128129 is 9218215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9218215 = 5 ⋅1843643.

It can be written as a sum of positive squares in 2 ways, for example, as 2958400 + 2169729 = 1720^2 + 1473^2 .

It is a cyclic number.

It is not a de Polignac number, because 5128129 - 2¹¹ = 5126081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5128097 and 5128106.

It is not an unprimeable number, because it can be changed into a prime (5128229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7272 + ... + 7945.

It is an arithmetic number, because the mean of its divisors is an integer number (1285921).

Almost surely, 2^5128129 is an apocalyptic number.

It is an amenable number.

5128129 is a deficient number, since it is larger than the sum of its proper divisors (15555).

5128129 is a wasteful number, since it uses less digits than its factorization.

5128129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15554.

The product of its digits is 1440, while the sum is 28.

The square root of 5128129 is about 2264.5372595742. The cubic root of 5128129 is about 172.4459425938.

The spelling of 5128129 in words is "five million, one hundred twenty-eight thousand, one hundred twenty-nine".