5707521 has 6 divisors (see below), whose sum is σ = 8244210. Its totient is φ = 3805008.

The previous prime is 5707501. The next prime is 5707523. The reversal of 5707521 is 1257075.

5707521 is a `hidden beast` number, since 570 + 75 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5588496 + 119025 = 2364^2 + 345^2 .

It is not a de Polignac number, because 5707521 - 2¹⁰ = 5706497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5707523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 317076 + ... + 317093.

It is an arithmetic number, because the mean of its divisors is an integer number (1374035).

Almost surely, 2^5707521 is an apocalyptic number.

It is an amenable number.

5707521 is a deficient number, since it is larger than the sum of its proper divisors (2536689).

5707521 is a wasteful number, since it uses less digits than its factorization.

5707521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634175 (or 634172 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 5707521 is about 2389.0418581515. The cubic root of 5707521 is about 178.7101308052.

The spelling of 5707521 in words is "five million, seven hundred seven thousand, five hundred twenty-one".