573921 has 12 divisors (see below), whose sum is σ = 848848. Its totient is φ = 373464.

The previous prime is 573901. The next prime is 573929. The reversal of 573921 is 129375.

573921 is a `hidden beast` number, since 573 + 92 + 1 = 666.

It is not a de Polignac number, because 573921 - 2⁹ = 573409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 573921.

It is not an unprimeable number, because it can be changed into a prime (573929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355 + ... + 1128.

2⁵⁷³⁹²¹ is an apocalyptic number.

It is an amenable number.

573921 is a deficient number, since it is larger than the sum of its proper divisors (274927).

573921 is a wasteful number, since it uses less digits than its factorization.

573921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532 (or 1529 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 573921 is about 757.5757387879. The cubic root of 573921 is about 83.1031282083.

The spelling of 573921 in words is "five hundred seventy-three thousand, nine hundred twenty-one".