5118521 has 4 divisors (see below), whose sum is σ = 5131812. Its totient is φ = 5105232.

The previous prime is 5118517. The next prime is 5118557. The reversal of 5118521 is 1258115.

5118521 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, and also an emirpimes, since its reverse is a distinct semiprime: 1258115 = 5 ⋅251623.

It can be written as a sum of positive squares in 2 ways, for example, as 3258025 + 1860496 = 1805^2 + 1364^2 .

It is a cyclic number.

It is not a de Polignac number, because 5118521 - 2² = 5118517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5118821) 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, 6050 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (1282953).

Almost surely, 2^5118521 is an apocalyptic number.

It is an amenable number.

5118521 is a deficient number, since it is larger than the sum of its proper divisors (13291).

5118521 is a wasteful number, since it uses less digits than its factorization.

5118521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13290.

The product of its digits is 400, while the sum is 23.

The square root of 5118521 is about 2262.4148602765. The cubic root of 5118521 is about 172.3381777246.

The spelling of 5118521 in words is "five million, one hundred eighteen thousand, five hundred twenty-one".