5206521 has 4 divisors (see below), whose sum is σ = 6942032. Its totient is φ = 3471012.

The previous prime is 5206511. The next prime is 5206541. The reversal of 5206521 is 1256025.

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 5206521 - 2⁵ = 5206489 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5206511) 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, 867751 + ... + 867756.

It is an arithmetic number, because the mean of its divisors is an integer number (1735508).

Almost surely, 2^5206521 is an apocalyptic number.

It is an amenable number.

5206521 is a deficient number, since it is larger than the sum of its proper divisors (1735511).

5206521 is a wasteful number, since it uses less digits than its factorization.

5206521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735510.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 5206521 is about 2281.7802260516. The cubic root of 5206521 is about 173.3202106272.

The spelling of 5206521 in words is "five million, two hundred six thousand, five hundred twenty-one".