5128705 has 4 divisors (see below), whose sum is σ = 6154452. Its totient is φ = 4102960.

The previous prime is 5128691. The next prime is 5128723. The reversal of 5128705 is 5078215.

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 651249 + 4477456 = 807^2 + 2116^2 .

It is not a de Polignac number, because 5128705 - 2¹¹ = 5126657 is a prime.

It is a super-2 number, since 2×5128705² = 52607229954050, which contains 22 as substring.

It is a Duffinian number.

5128705 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512866 + ... + 512875.

It is an arithmetic number, because the mean of its divisors is an integer number (1538613).

Almost surely, 2^5128705 is an apocalyptic number.

It is an amenable number.

5128705 is a deficient number, since it is larger than the sum of its proper divisors (1025747).

5128705 is a wasteful number, since it uses less digits than its factorization.

5128705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025746.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 5128705 is about 2264.6644343037. The cubic root of 5128705 is about 172.4523988240.

The spelling of 5128705 in words is "five million, one hundred twenty-eight thousand, seven hundred five".