58421721 has 8 divisors (see below), whose sum is σ = 78230880. Its totient is φ = 38780192.

The previous prime is 58421687. The next prime is 58421723. The reversal of 58421721 is 12712485.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 58421721 - 2¹⁰ = 58420697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (58421723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41091 + ... + 42488.

It is an arithmetic number, because the mean of its divisors is an integer number (9778860).

Almost surely, 2^58421721 is an apocalyptic number.

It is an amenable number.

58421721 is a deficient number, since it is larger than the sum of its proper divisors (19809159).

58421721 is a wasteful number, since it uses less digits than its factorization.

58421721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83815.

The product of its digits is 4480, while the sum is 30.

The square root of 58421721 is about 7643.4102990746. The cubic root of 58421721 is about 388.0235774988.

The spelling of 58421721 in words is "fifty-eight million, four hundred twenty-one thousand, seven hundred twenty-one".