458721 has 6 divisors (see below), whose sum is σ = 662610. Its totient is φ = 305808.

The previous prime is 458719. The next prime is 458729. The reversal of 458721 is 127854.

It can be written as a sum of positive squares in only one way, i.e., 318096 + 140625 = 564^2 + 375^2 .

It is not a de Polignac number, because 458721 - 2¹ = 458719 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (458729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25476 + ... + 25493.

It is an arithmetic number, because the mean of its divisors is an integer number (110435).

458721 is a Friedman number, since it can be written as 7*4^8-2^5+1, using all its digits and the basic arithmetic operations.

2⁴⁵⁸⁷²¹ is an apocalyptic number.

It is an amenable number.

458721 is a deficient number, since it is larger than the sum of its proper divisors (203889).

458721 is a wasteful number, since it uses less digits than its factorization.

458721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50975 (or 50972 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 458721 is about 677.2894506782. The cubic root of 458721 is about 77.1228151933.

The spelling of 458721 in words is "four hundred fifty-eight thousand, seven hundred twenty-one".