457128421 has 8 divisors (see below), whose sum is σ = 473241600. Its totient is φ = 441038640.

The previous prime is 457128407. The next prime is 457128437. The reversal of 457128421 is 124821754.

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 457128421 - 2⁵ = 457128389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (457120421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40156 + ... + 50266.

It is an arithmetic number, because the mean of its divisors is an integer number (59155200).

Almost surely, 2^457128421 is an apocalyptic number.

It is an amenable number.

457128421 is a deficient number, since it is larger than the sum of its proper divisors (16113179).

457128421 is a wasteful number, since it uses less digits than its factorization.

457128421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11699.

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

The square root of 457128421 is about 21380.5617559502. The cubic root of 457128421 is about 770.3346052361.

The spelling of 457128421 in words is "four hundred fifty-seven million, one hundred twenty-eight thousand, four hundred twenty-one".