458142721 has 4 divisors (see below), whose sum is σ = 461750272. Its totient is φ = 454535172.

The previous prime is 458142709. The next prime is 458142739. The reversal of 458142721 is 127241854.

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, and also an emirpimes, since its reverse is a distinct semiprime: 127241854 = 2 ⋅63620927.

It is a cyclic number.

It is not a de Polignac number, because 458142721 - 2⁵ = 458142689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (458142791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1803585 + ... + 1803838.

It is an arithmetic number, because the mean of its divisors is an integer number (115437568).

Almost surely, 2^458142721 is an apocalyptic number.

It is an amenable number.

458142721 is a deficient number, since it is larger than the sum of its proper divisors (3607551).

458142721 is a wasteful number, since it uses less digits than its factorization.

458142721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607550.

The product of its digits is 17920, while the sum is 34.

The square root of 458142721 is about 21404.2687564887. The cubic root of 458142721 is about 770.9039370077.

The spelling of 458142721 in words is "four hundred fifty-eight million, one hundred forty-two thousand, seven hundred twenty-one".