5706521 has 4 divisors (see below), whose sum is σ = 5712000. Its totient is φ = 5701044.

The previous prime is 5706497. The next prime is 5706529. The reversal of 5706521 is 1256075.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5706521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5706529) 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, 641 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (1428000).

Almost surely, 2^5706521 is an apocalyptic number.

It is an amenable number.

5706521 is a deficient number, since it is larger than the sum of its proper divisors (5479).

5706521 is a wasteful number, since it uses less digits than its factorization.

5706521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 5706521 is about 2388.8325600594. The cubic root of 5706521 is about 178.6996930822.

The spelling of 5706521 in words is "five million, seven hundred six thousand, five hundred twenty-one".