5121685 has 4 divisors (see below), whose sum is σ = 6146028. Its totient is φ = 4097344.

The previous prime is 5121673. The next prime is 5121689. The reversal of 5121685 is 5861215.

5121685 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 1999396 + 3122289 = 1414^2 + 1767^2 .

It is a cyclic number.

It is not a de Polignac number, because 5121685 - 2⁵ = 5121653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512164 + ... + 512173.

It is an arithmetic number, because the mean of its divisors is an integer number (1536507).

Almost surely, 2^5121685 is an apocalyptic number.

It is an amenable number.

5121685 is a deficient number, since it is larger than the sum of its proper divisors (1024343).

5121685 is a wasteful number, since it uses less digits than its factorization.

5121685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024342.

The product of its digits is 2400, while the sum is 28.

The square root of 5121685 is about 2263.1140050824. The cubic root of 5121685 is about 172.3736805374.

It can be divided in two parts, 512 and 1685, that added together give a cube (2197 = 13³).

The spelling of 5121685 in words is "five million, one hundred twenty-one thousand, six hundred eighty-five".