58721 has 4 divisors (see below), whose sum is σ = 63252. Its totient is φ = 54192.

The previous prime is 58711. The next prime is 58727. The reversal of 58721 is 12785.

58721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12785 = 5 ⋅2557.

It can be written as a sum of positive squares in 2 ways, for example, as 3025 + 55696 = 55^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 58721 - 2⁶ = 58657 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 58721.

It is not an unprimeable number, because it can be changed into a prime (58727) 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, 2246 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (15813).

2⁵⁸⁷²¹ is an apocalyptic number.

It is an amenable number.

58721 is a deficient number, since it is larger than the sum of its proper divisors (4531).

58721 is a wasteful number, since it uses less digits than its factorization.

58721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530.

The product of its digits is 560, while the sum is 23.

The square root of 58721 is about 242.3241630544. The cubic root of 58721 is about 38.8685029964.

The spelling of 58721 in words is "fifty-eight thousand, seven hundred twenty-one".