521648 has 10 divisors (see below), whose sum is σ = 1010724. Its totient is φ = 260816.

The previous prime is 521641. The next prime is 521657. The reversal of 521648 is 846125.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521648.

It is not an unprimeable number, because it can be changed into a prime (521641) by changing a digit.

521648 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16286 + ... + 16317.

2⁵²¹⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

521648 is a deficient number, since it is larger than the sum of its proper divisors (489076).

521648 is a wasteful number, since it uses less digits than its factorization.

521648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32611 (or 32605 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 521648 is about 722.2520335728. The cubic root of 521648 is about 80.4993763052.

The spelling of 521648 in words is "five hundred twenty-one thousand, six hundred forty-eight".