5709521 has 4 divisors (see below), whose sum is σ = 5714532. Its totient is φ = 5704512.

The previous prime is 5709493. The next prime is 5709523. The reversal of 5709521 is 1259075.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2235025 + 3474496 = 1495^2 + 1864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5709521 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5709523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (1428633).

Almost surely, 2^5709521 is an apocalyptic number.

It is an amenable number.

5709521 is a deficient number, since it is larger than the sum of its proper divisors (5011).

5709521 is a wasteful number, since it uses less digits than its factorization.

5709521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 5709521 is about 2389.4603993371. The cubic root of 5709521 is about 178.7310025941.

The spelling of 5709521 in words is "five million, seven hundred nine thousand, five hundred twenty-one".