457284721 has 4 divisors (see below), whose sum is σ = 458224192. Its totient is φ = 456345252.

The previous prime is 457284697. The next prime is 457284733. The reversal of 457284721 is 127482754.

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 not a de Polignac number, because 457284721 - 2⁷ = 457284593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (457288721) 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, 469005 + ... + 469978.

It is an arithmetic number, because the mean of its divisors is an integer number (114556048).

Almost surely, 2^457284721 is an apocalyptic number.

It is an amenable number.

457284721 is a deficient number, since it is larger than the sum of its proper divisors (939471).

457284721 is an equidigital number, since it uses as much as digits as its factorization.

457284721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939470.

The product of its digits is 125440, while the sum is 40.

The square root of 457284721 is about 21384.2166328346. The cubic root of 457284721 is about 770.4223920761.

The spelling of 457284721 in words is "four hundred fifty-seven million, two hundred eighty-four thousand, seven hundred twenty-one".