457506721 has 4 divisors (see below), whose sum is σ = 522864832. Its totient is φ = 392148612.

The previous prime is 457506701. The next prime is 457506727. The reversal of 457506721 is 127605754.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-457506721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (457506727) 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 3 ways as a sum of consecutive naturals, for example, 32679045 + ... + 32679058.

It is an arithmetic number, because the mean of its divisors is an integer number (130716208).

Almost surely, 2^457506721 is an apocalyptic number.

It is an amenable number.

457506721 is a deficient number, since it is larger than the sum of its proper divisors (65358111).

457506721 is an equidigital number, since it uses as much as digits as its factorization.

457506721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65358110.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 457506721 is about 21389.4067472663. The cubic root of 457506721 is about 770.5470453415.

The spelling of 457506721 in words is "four hundred fifty-seven million, five hundred six thousand, seven hundred twenty-one".