522647 has 4 divisors (see below), whose sum is σ = 525336. Its totient is φ = 519960.

The previous prime is 522637. The next prime is 522659. The reversal of 522647 is 746225.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 522647 - 2⁸ = 522391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522637) 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, 1028 + ... + 1449.

It is an arithmetic number, because the mean of its divisors is an integer number (131334).

2⁵²²⁶⁴⁷ is an apocalyptic number.

522647 is a deficient number, since it is larger than the sum of its proper divisors (2689).

522647 is a wasteful number, since it uses less digits than its factorization.

522647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688.

The product of its digits is 3360, while the sum is 26.

The square root of 522647 is about 722.9432896154. The cubic root of 522647 is about 80.5507312388.

The spelling of 522647 in words is "five hundred twenty-two thousand, six hundred forty-seven".