524721 has 4 divisors (see below), whose sum is σ = 699632. Its totient is φ = 349812.

The previous prime is 524707. The next prime is 524731. The reversal of 524721 is 127425.

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.

It is not a de Polignac number, because 524721 - 2⁷ = 524593 is a prime.

It is a d-powerful number, because it can be written as 5³ + 2 + 7² + 4⁴ + 2¹⁹ + 1 .

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 524721.

It is not an unprimeable number, because it can be changed into a prime (524701) 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, 87451 + ... + 87456.

It is an arithmetic number, because the mean of its divisors is an integer number (174908).

2⁵²⁴⁷²¹ is an apocalyptic number.

It is an amenable number.

524721 is a deficient number, since it is larger than the sum of its proper divisors (174911).

524721 is a wasteful number, since it uses less digits than its factorization.

524721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174910.

The product of its digits is 560, while the sum is 21.

The square root of 524721 is about 724.3762834329. The cubic root of 524721 is about 80.6571394010.

The spelling of 524721 in words is "five hundred twenty-four thousand, seven hundred twenty-one".