5187521 has 4 divisors (see below), whose sum is σ = 5218752. Its totient is φ = 5156292.

The previous prime is 5187517. The next prime is 5187527. The reversal of 5187521 is 1257815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5187521 - 2² = 5187517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5187527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15365 + ... + 15698.

It is an arithmetic number, because the mean of its divisors is an integer number (1304688).

Almost surely, 2^5187521 is an apocalyptic number.

It is an amenable number.

5187521 is a deficient number, since it is larger than the sum of its proper divisors (31231).

5187521 is a wasteful number, since it uses less digits than its factorization.

5187521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31230.

The product of its digits is 2800, while the sum is 29.

The square root of 5187521 is about 2277.6130048803. The cubic root of 5187521 is about 173.1091229081.

The spelling of 5187521 in words is "five million, one hundred eighty-seven thousand, five hundred twenty-one".